....

backend/app/Http/Controllers/Api/MeetingsController.php

@@ -529,12 +529,16 @@ class MeetingsController extends Controller {
                 $update['pdf'] = '/storage/'.$filename;
 
                 if ($chk = Meeting::select('pdf')->where('id', (int)$meeting_id)->first()) {
-                    if (Storage::disk('public')->has($chk->pdf)) {
-                        Storage::disk('public')->delete($chk->pdf);
+                    if (Storage::disk('public')->exists($chk->pdf)) {
+                        if (Storage::disk('public')->get($chk->pdf) != $pdf) {
+                            Storage::disk('public')->delete($chk->pdf);
+                            Storage::disk('public')->put($filename, $pdf);
+                        }
                     }
                 }
-
-                Storage::disk('public')->put($filename, $pdf);
+                else {
+                    Storage::disk('public')->put($filename, $pdf);
+                }
             }
 
             Meeting::where('id', (int)$meeting_id)->update($update);