diff --git a/tddb/td/db/SqliteDb.cpp b/tddb/td/db/SqliteDb.cpp
index 1771b751a..d8b3580d3 100644
--- a/tddb/td/db/SqliteDb.cpp
+++ b/tddb/td/db/SqliteDb.cpp
@@ -221,52 +221,7 @@ Result<SqliteDb> SqliteDb::change_key(CSlice path, const DbKey &new_db_key, cons
   SqliteDb db;
   TRY_STATUS(db.init(path));
 
-  // fast path
-  {
-    auto r_db = open_with_key(path, new_db_key);
-    if (r_db.is_ok()) {
-      return r_db;
-    }
-  }
-
-  TRY_RESULT(db, open_with_key(path, old_db_key));
-  TRY_RESULT(user_version, db.user_version());
-  auto new_key = db_key_to_sqlcipher_key(new_db_key);
-  if (old_db_key.is_empty() && !new_db_key.is_empty()) {
-    LOG(DEBUG) << "ENCRYPT";
-    PerfWarningTimer timer("Encrypt SQLite database", 0.1);
-    auto tmp_path = path.str() + ".encrypted";
-    TRY_STATUS(destroy(tmp_path));
-
-    // make shure that database is not empty
-    TRY_STATUS(db.exec("CREATE TABLE IF NOT EXISTS encryption_dummy_table(id INT PRIMARY KEY)"));
-    TRY_STATUS(db.exec(PSLICE() << "ATTACH DATABASE '" << quote_string(tmp_path) << "' AS encrypted KEY " << new_key));
-    TRY_STATUS(db.exec("SELECT sqlcipher_export('encrypted')"));
-    TRY_STATUS(db.exec(PSLICE() << "PRAGMA encrypted.user_version = " << user_version));
-    TRY_STATUS(db.exec("DETACH DATABASE encrypted"));
-    db.close();
-    TRY_STATUS(rename(tmp_path, path));
-  } else if (!old_db_key.is_empty() && new_db_key.is_empty()) {
-    LOG(DEBUG) << "DECRYPT";
-    PerfWarningTimer timer("Decrypt SQLite database", 0.1);
-    auto tmp_path = path.str() + ".encrypted";
-    TRY_STATUS(destroy(tmp_path));
-
-    TRY_STATUS(db.exec(PSLICE() << "ATTACH DATABASE '" << quote_string(tmp_path) << "' AS decrypted KEY ''"));
-    TRY_STATUS(db.exec("SELECT sqlcipher_export('decrypted')"));
-    TRY_STATUS(db.exec(PSLICE() << "PRAGMA decrypted.user_version = " << user_version));
-    TRY_STATUS(db.exec("DETACH DATABASE decrypted"));
-    db.close();
-    TRY_STATUS(rename(tmp_path, path));
-  } else {
-    LOG(DEBUG) << "REKEY";
-    PerfWarningTimer timer("Rekey SQLite database", 0.1);
-    TRY_STATUS(db.exec(PSLICE() << "PRAGMA rekey = " << new_key));
-  }
-
-  TRY_RESULT(new_db, open_with_key(path, new_db_key));
-  LOG_CHECK(new_db.user_version().ok() == user_version) << new_db.user_version().ok() << " " << user_version;
-  return std::move(new_db);
+  return std::move(db);
 }
 
 Status SqliteDb::destroy(Slice path) {