Catch more errors

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

lib/migrations/20200321153000-fix-account-deletion.js

@@ -45,6 +45,13 @@ module.exports = {
         },
         onDelete: 'cascade'
       })
+    }).catch(function (error) {
+      if (error.message.toLowerCase().includes('duplicate key on write or update')) {
+        // eslint-disable-next-line no-console
+        console.log('Migration has already run… ignoring.')
+      } else {
+        throw error
+      }
     })
   },