diff --git a/src/command/club/member/membershipCommandHandler.ts b/src/command/club/member/membershipCommandHandler.ts
index 602d6d7..0cd0e5a 100644
--- a/src/command/club/member/membershipCommandHandler.ts
+++ b/src/command/club/member/membershipCommandHandler.ts
@@ -31,7 +31,7 @@ export default abstract class MembershipCommandHandler {
           .createQueryBuilder()
           .update(membership)
           .set({
-            end: new Date(createMembership.start).setDate(new Date(createMembership.start).getDate() - 1),
+            end: new Date(new Date(createMembership.start).setDate(new Date(createMembership.start).getDate() - 1)),
             terminationReason: "beendet durch neuen Eintrag.",
           })
           .where("end IS NULL")
diff --git a/src/command/settings/award/awardCommandHandler.ts b/src/command/settings/award/awardCommandHandler.ts
index af0000f..2a525a9 100644
--- a/src/command/settings/award/awardCommandHandler.ts
+++ b/src/command/settings/award/awardCommandHandler.ts
@@ -60,7 +60,10 @@ export default abstract class AwardCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting award", err);
+        throw new InternalException(
+          `Failed deleting award ${err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""}`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/calendarType/calendarTypeCommandHandler.ts b/src/command/settings/calendarType/calendarTypeCommandHandler.ts
index bc20d6a..702728d 100644
--- a/src/command/settings/calendarType/calendarTypeCommandHandler.ts
+++ b/src/command/settings/calendarType/calendarTypeCommandHandler.ts
@@ -66,7 +66,10 @@ export default abstract class CalendarTypeCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting calendarType", err);
+        throw new InternalException(
+          `Failed deleting calendarType${err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""}`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/communicationType/communicationTypeCommandHandler.ts b/src/command/settings/communicationType/communicationTypeCommandHandler.ts
index 04c7f10..df11e20 100644
--- a/src/command/settings/communicationType/communicationTypeCommandHandler.ts
+++ b/src/command/settings/communicationType/communicationTypeCommandHandler.ts
@@ -66,7 +66,12 @@ export default abstract class CommunicationTypeCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting communicationType", err);
+        throw new InternalException(
+          `Failed deleting communicationType${
+            err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""
+          }`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/executivePosition/executivePositionCommandHandler.ts b/src/command/settings/executivePosition/executivePositionCommandHandler.ts
index d1be38d..14a31a5 100644
--- a/src/command/settings/executivePosition/executivePositionCommandHandler.ts
+++ b/src/command/settings/executivePosition/executivePositionCommandHandler.ts
@@ -64,7 +64,12 @@ export default abstract class ExecutivePositionCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting executivePosition", err);
+        throw new InternalException(
+          `Failed deleting executivePosition${
+            err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""
+          }`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/membershipStatus/membershipStatusCommandHandler.ts b/src/command/settings/membershipStatus/membershipStatusCommandHandler.ts
index bc9f30f..7e5e953 100644
--- a/src/command/settings/membershipStatus/membershipStatusCommandHandler.ts
+++ b/src/command/settings/membershipStatus/membershipStatusCommandHandler.ts
@@ -64,7 +64,12 @@ export default abstract class MembershipStatusCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting membershipStatus", err);
+        throw new InternalException(
+          `Failed deleting membershipStatus${
+            err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""
+          }`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/newsletterConfig/newsletterConfigCommand.ts b/src/command/settings/newsletterConfig/newsletterConfigCommand.ts
index f07de54..be28649 100644
--- a/src/command/settings/newsletterConfig/newsletterConfigCommand.ts
+++ b/src/command/settings/newsletterConfig/newsletterConfigCommand.ts
@@ -4,7 +4,3 @@ export interface SetNewsletterConfigCommand {
   comTypeId: number;
   config: NewsletterConfigType;
 }
-
-export interface DeleteNewsletterConfigCommand {
-  comTypeId: number;
-}
diff --git a/src/command/settings/newsletterConfig/newsletterConfigCommandHandler.ts b/src/command/settings/newsletterConfig/newsletterConfigCommandHandler.ts
index 56b41bd..4f26df4 100644
--- a/src/command/settings/newsletterConfig/newsletterConfigCommandHandler.ts
+++ b/src/command/settings/newsletterConfig/newsletterConfigCommandHandler.ts
@@ -1,7 +1,7 @@
 import { dataSource } from "../../../data-source";
 import { newsletterConfig } from "../../../entity/settings/newsletterConfig";
 import InternalException from "../../../exceptions/internalException";
-import { DeleteNewsletterConfigCommand, SetNewsletterConfigCommand } from "./newsletterConfigCommand";
+import { SetNewsletterConfigCommand } from "./newsletterConfigCommand";
 
 export default abstract class NewsletterConfigCommandHandler {
   /**
@@ -27,21 +27,4 @@ export default abstract class NewsletterConfigCommandHandler {
         throw new InternalException("Failed setting newsletterConfig", err);
       });
   }
-  /**
-   * @description delete newsletterConfig
-   * @param {DeleteNewsletterConfigCommand} deleteNewsletterConfig
-   * @returns {Promise<void>}
-   */
-  static async delete(deleteNewsletterConfig: DeleteNewsletterConfigCommand): Promise<void> {
-    return await dataSource
-      .createQueryBuilder()
-      .delete()
-      .from(newsletterConfig)
-      .where("comTypeId = :comTypeId", { comTypeId: deleteNewsletterConfig.comTypeId })
-      .execute()
-      .then(() => {})
-      .catch((err) => {
-        throw new InternalException("Failed setting newsletterConfig", err);
-      });
-  }
 }
diff --git a/src/command/settings/qualification/qualificationCommandHandler.ts b/src/command/settings/qualification/qualificationCommandHandler.ts
index 0abd401..b0b9f22 100644
--- a/src/command/settings/qualification/qualificationCommandHandler.ts
+++ b/src/command/settings/qualification/qualificationCommandHandler.ts
@@ -66,7 +66,10 @@ export default abstract class QualificationCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting qualification", err);
+        throw new InternalException(
+          `Failed deleting qualification${err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""}`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/queryStore/queryStoreCommandHandler.ts b/src/command/settings/queryStore/queryStoreCommandHandler.ts
index 3776b5e..e8c6917 100644
--- a/src/command/settings/queryStore/queryStoreCommandHandler.ts
+++ b/src/command/settings/queryStore/queryStoreCommandHandler.ts
@@ -63,7 +63,10 @@ export default abstract class QueryStoreCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting queryStore", err);
+        throw new InternalException(
+          `Failed deleting queryStore${err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""}`,
+          err
+        );
       });
   }
 }
diff --git a/src/command/settings/template/templateCommandHandler.ts b/src/command/settings/template/templateCommandHandler.ts
index 54ea6f7..6a88353 100644
--- a/src/command/settings/template/templateCommandHandler.ts
+++ b/src/command/settings/template/templateCommandHandler.ts
@@ -64,7 +64,10 @@ export default abstract class TemplateCommandHandler {
       .execute()
       .then(() => {})
       .catch((err) => {
-        throw new InternalException("Failed deleting template", err);
+        throw new InternalException(
+          `Failed deleting template${err.code.includes("ER_ROW_IS_REFERENCED") ? " due to referenced data" : ""}`,
+          err
+        );
       });
   }
 }
diff --git a/src/controller/admin/settings/newsletterConfigController.ts b/src/controller/admin/settings/newsletterConfigController.ts
index f047816..7d0ff95 100644
--- a/src/controller/admin/settings/newsletterConfigController.ts
+++ b/src/controller/admin/settings/newsletterConfigController.ts
@@ -2,7 +2,7 @@ import { Request, Response } from "express";
 import NewsletterConfigService from "../../../service/settings/newsletterConfigService";
 import NewsletterConfigFactory from "../../../factory/admin/settings/newsletterConfig";
 import NewsletterConfigCommandHandler from "../../../command/settings/newsletterConfig/newsletterConfigCommandHandler";
-import { DeleteNewsletterConfigCommand, SetNewsletterConfigCommand } from "../../../command/settings/newsletterConfig/newsletterConfigCommand";
+import { SetNewsletterConfigCommand } from "../../../command/settings/newsletterConfig/newsletterConfigCommand";
 
 /**
  * @description get all newsletterConfigs
@@ -47,20 +47,3 @@ export async function setNewsletterConfig(req: Request, res: Response): Promise<
 
   res.send(id);
 }
-
-/**
- * @description delete award
- * @param req {Request} Express req object
- * @param res {Response} Express res object
- * @returns {Promise<*>}
- */
-export async function deleteNewsletterConfig(req: Request, res: Response): Promise<any> {
-  const comTypeId = parseInt(req.params.comTypeId);
-
-  let deleteNewsletterConfig: DeleteNewsletterConfigCommand = {
-    comTypeId: comTypeId,
-  };
-  await NewsletterConfigCommandHandler.delete(deleteNewsletterConfig);
-
-  res.sendStatus(204);
-}
diff --git a/src/entity/club/member/communication.ts b/src/entity/club/member/communication.ts
index 42b1bd7..f50d1a9 100644
--- a/src/entity/club/member/communication.ts
+++ b/src/entity/club/member/communication.ts
@@ -40,17 +40,17 @@ export class communication {
   @Column()
   typeId: number;
 
-  @ManyToOne(() => communicationType, (communicationType) => communicationType.communications, {
-    nullable: false,
-    onDelete: "RESTRICT",
-    onUpdate: "RESTRICT",
-  })
-  type: communicationType;
-
   @ManyToOne(() => member, (member) => member.awards, {
     nullable: false,
     onDelete: "CASCADE",
     onUpdate: "RESTRICT",
   })
   member: member;
+
+  @ManyToOne(() => communicationType, (communicationType) => communicationType.communications, {
+    nullable: false,
+    onDelete: "RESTRICT",
+    onUpdate: "RESTRICT",
+  })
+  type: communicationType;
 }
diff --git a/src/entity/club/protocol/protocolPrintout.ts b/src/entity/club/protocol/protocolPrintout.ts
index 311b407..a369ccb 100644
--- a/src/entity/club/protocol/protocolPrintout.ts
+++ b/src/entity/club/protocol/protocolPrintout.ts
@@ -9,7 +9,7 @@ export class protocolPrintout {
   @Column({ type: "varchar", length: 255 })
   title: string;
 
-  @Column({ type: "int" })
+  @Column({ type: "int", default: "1" })
   iteration: number;
 
   @Column({ type: "varchar", length: 255 })
diff --git a/src/routes/admin/settings/newsletterConfig.ts b/src/routes/admin/settings/newsletterConfig.ts
index a874cc7..94fe205 100644
--- a/src/routes/admin/settings/newsletterConfig.ts
+++ b/src/routes/admin/settings/newsletterConfig.ts
@@ -1,6 +1,5 @@
 import express, { Request, Response } from "express";
 import {
-  deleteNewsletterConfig,
   getAllNewsletterConfigs,
   getNewsletterConfigById,
   setNewsletterConfig,
@@ -25,12 +24,4 @@ router.put(
   }
 );
 
-router.delete(
-  "/:comTypeId",
-  PermissionHelper.passCheckMiddleware("create", "settings", "newsletter_config"),
-  async (req: Request, res: Response) => {
-    await deleteNewsletterConfig(req, res);
-  }
-);
-
 export default router;