diff --git a/projects/player/src/app/app.component.ts b/projects/player/src/app/app.component.ts
index 5a9a0be0e78fc7a6265c3666840fc0bf265db081..440cd9a7d51351c68c61088c24dc34d678ac099b 100644
--- a/projects/player/src/app/app.component.ts
+++ b/projects/player/src/app/app.component.ts
@@ -1,7 +1,6 @@
 import { Component, OnInit } from '@angular/core';
 import { registerLocaleData } from '@angular/common';
 import localeDe from '@angular/common/locales/de';
-import { MatDialog } from '@angular/material/dialog';
 import { TranslateService } from '@ngx-translate/core';
 import { PlayerConfig, VopStartCommand } from './models/verona';
 import { UnitStateElementMapperService } from './services/unit-state-element-mapper.service';
@@ -11,7 +10,6 @@ import { NativeEventService } from './services/native-event.service';
 import { MetaDataService } from './services/meta-data.service';
 import { UnitStateService } from './services/unit-state.service';
 import { MediaPlayerService } from './services/media-player.service';
-import { AlertDialogComponent } from './components/alert-dialog/alert-dialog.component';
 import { Page, Unit } from '../../../common/interfaces/unit';
 import { UnitDefinitionSanitizer } from '../../../common/util/unit-definition-sanitizer';
 import { ValidatorService } from './services/validator.service';
@@ -38,8 +36,7 @@ export class AppComponent implements OnInit {
               private unitStateService: UnitStateService,
               private mediaPlayerService: MediaPlayerService,
               private unitStateElementMapperService: UnitStateElementMapperService,
-              private validatorService: ValidatorService,
-              private dialog: MatDialog) {
+              private validatorService: ValidatorService) {
   }
 
   ngOnInit(): void {
@@ -65,24 +62,14 @@ export class AppComponent implements OnInit {
       if (message.unitDefinition) {
         const unitDefinition: Unit = UnitDefinitionSanitizer.sanitize(JSON.parse(message.unitDefinition));
         this.unitStateElementMapperService.registerDropListValueIds(unitDefinition);
-        if (this.metaDataService.verifyUnitDefinitionVersion(unitDefinition.unitDefinitionType)) {
-          this.playerConfig = message.playerConfig || {};
-          this.veronaPostService.sessionId = message.sessionId;
-          this.veronaPostService.stateReportPolicy = message.playerConfig?.stateReportPolicy || 'none';
-          this.pages = unitDefinition.pages;
-          this.unitStateService.unitStateElementCodes = message.unitState?.dataParts?.elementCodes ?
-            JSON.parse(message.unitState.dataParts.elementCodes) : [];
-          // eslint-disable-next-line no-console
-          console.log('player: unitStateElementCodes', this.unitStateService.unitStateElementCodes);
-        } else {
-          this.dialog.open(AlertDialogComponent, {
-            data: {
-              title: this.translateService.instant('dialogTitle.wrongUnitDefinitionType'),
-              content: this.translateService.instant('dialogContent.wrongUnitDefinitionType',
-                { version: this.metaDataService.playerMetadata.supportedUnitDefinitionTypes })
-            }
-          });
-        }
+        this.playerConfig = message.playerConfig || {};
+        this.veronaPostService.sessionId = message.sessionId;
+        this.veronaPostService.stateReportPolicy = message.playerConfig?.stateReportPolicy || 'none';
+        this.pages = unitDefinition.pages;
+        this.unitStateService.unitStateElementCodes = message.unitState?.dataParts?.elementCodes ?
+          JSON.parse(message.unitState.dataParts.elementCodes) : [];
+        // eslint-disable-next-line no-console
+        console.log('player: unitStateElementCodes', this.unitStateService.unitStateElementCodes);
       } else {
         // eslint-disable-next-line no-console
         console.warn('player: message has no unitDefinition');
diff --git a/projects/player/src/app/app.module.ts b/projects/player/src/app/app.module.ts
index 9d277016869bcd46032eecf62a0aaeb1eea233be..b7bc636907f073863be7d01e61b6c137b2562fe1 100644
--- a/projects/player/src/app/app.module.ts
+++ b/projects/player/src/app/app.module.ts
@@ -14,7 +14,6 @@ import { PlayerTranslateLoader } from './classes/player-translate-loader';
 import { LayoutComponent } from './components/layout/layout.component';
 import { HideFirstChildDirective } from './directives/hide-first-child.directive';
 import { ScrollIndexDirective } from './directives/scroll-index.directive';
-import { AlertDialogComponent } from './components/alert-dialog/alert-dialog.component';
 import { IntersectionDetectionDirective } from './directives/intersection-detection.directive';
 import { KeyboardComponent } from './components/keyboard/keyboard.component';
 import { KeyComponent } from './components/key/key.component';
@@ -46,7 +45,6 @@ import { UnitStateComponent } from './components/unit-state/unit-state.component
     SectionComponent,
     PlayerStateComponent,
     LayoutComponent,
-    AlertDialogComponent,
     HideFirstChildDirective,
     ScrollIndexDirective,
     IntersectionDetectionDirective,
diff --git a/projects/player/src/app/components/alert-dialog/alert-dialog.component.css b/projects/player/src/app/components/alert-dialog/alert-dialog.component.css
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/projects/player/src/app/components/alert-dialog/alert-dialog.component.html b/projects/player/src/app/components/alert-dialog/alert-dialog.component.html
deleted file mode 100644
index 66e813d925ebdd9596cb6fb29319b46a7741f58c..0000000000000000000000000000000000000000
--- a/projects/player/src/app/components/alert-dialog/alert-dialog.component.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<h2 mat-dialog-title>{{data.title}}</h2>
-<mat-dialog-content class="mat-typography">
-  <p>{{data.content}}</p>
-</mat-dialog-content>
-<mat-dialog-actions>
-  <button mat-button mat-dialog-close>{{'close' | translate}}</button>
-</mat-dialog-actions>
diff --git a/projects/player/src/app/components/alert-dialog/alert-dialog.component.ts b/projects/player/src/app/components/alert-dialog/alert-dialog.component.ts
deleted file mode 100644
index 5711738379f4553dfa0a1233ac951535da4d421f..0000000000000000000000000000000000000000
--- a/projects/player/src/app/components/alert-dialog/alert-dialog.component.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import { Component, Inject } from '@angular/core';
-import { MAT_DIALOG_DATA } from '@angular/material/dialog';
-
-@Component({
-  selector: 'aspect-alert-dialog',
-  templateUrl: './alert-dialog.component.html',
-  styleUrls: ['./alert-dialog.component.css']
-})
-export class AlertDialogComponent {
-  constructor(@Inject(MAT_DIALOG_DATA) public data: { title: string, content: string }) { }
-}
diff --git a/projects/player/src/app/services/meta-data.service.ts b/projects/player/src/app/services/meta-data.service.ts
index 495247c199b028a0153d64fa0207066ab675a4dc..3c5a5e4cd45409355fa25c9017937a7e7f3f0c1e 100644
--- a/projects/player/src/app/services/meta-data.service.ts
+++ b/projects/player/src/app/services/meta-data.service.ts
@@ -13,16 +13,4 @@ export class MetaDataService {
       this.playerMetadata = JSON.parse(playerMetadata);
     }
   }
-
-  // eslint-disable-next-line class-methods-use-this
-  verifyUnitDefinitionVersion(unitDefinition: string | undefined): boolean {
-    return true;
-    // return (!!unitDefinition && unitDefinition === this.playerMetadata.supportedUnitDefinitionTypes);
-  }
-
-  // eslint-disable-next-line class-methods-use-this
-  verifyUnitStateDataType(unitStateDataType: string | undefined): boolean {
-    return true;
-    // return (!!unitStateDataType && unitStateDataType === this.playerMetadata.supportedUnitStateDataTypes);
-  }
 }