message: Fixed NPE on drop index
diff: @@ -125,7 +125,7 @@ export default class MongoDBStorage {
  { fields: { issuer: 1, timestamp: 1 } },
  { fields: { chargeBoxID: 1 } },
  { fields: { tagID: 1 } },
  - { fields: { userID: 1 } }
  + { fields: { userID: 1 } },
  ]);
  // Settings
  await this.handleIndexesInCollection(tenantID, 'settings', [
  @@ -359,7 +359,7 @@ export default class MongoDBStorage {
  let foundIndex = indexes.find((index) => this.buildIndexName(index.fields) === databaseIndex.name);
  // Check DB unique index
  const databaseIndexISUnique = !!databaseIndex?.unique;
  - const indexIsUnique = !!foundIndex.options?.unique;
  + const indexIsUnique = !!foundIndex?.options?.unique;
  if (indexIsUnique !== databaseIndexISUnique) {
  // Delete the index
  foundIndex = null;
  