diff --git a/app/core/background/indexer_service.py b/app/core/background/indexer_service.py
index 1fdd671..d0b942b 100644
--- a/app/core/background/indexer_service.py
+++ b/app/core/background/indexer_service.py
@@ -3,7 +3,7 @@ from base64 import b64decode
 from datetime import datetime
 
 from base58 import b58encode
-from sqlalchemy import and_, desc
+from sqlalchemy import String, and_, desc, cast
 from tonsdk.boc import Cell
 from tonsdk.utils import Address
 from app.core._config import CLIENT_TELEGRAM_BOT_USERNAME
@@ -227,16 +227,18 @@ async def indexer_loop(memory, platform_found: bool, seqno: int) -> [bool, int]:
                         ])
                     )
 
-                    for hint_message in session.query(KnownTelegramMessage).filter(
-                        and_(
-                            KnownTelegramMessage.chat_id == user.telegram_id,
-                            KnownTelegramMessage.type == 'hint',
-                            KnownTelegramMessage.meta['encrypted_content_hash'].astext == encrypted_stored_content.hash,
-                            KnownTelegramMessage.deleted == False
-                        )
-                    ).all():
-                        await user_uploader_wrapper.delete_message(hint_message.message_id)
-
+                    try:
+                        for hint_message in session.query(KnownTelegramMessage).filter(
+                            and_(
+                                KnownTelegramMessage.chat_id == user.telegram_id,
+                                KnownTelegramMessage.type == 'hint',
+                                cast(KnownTelegramMessage.meta['encrypted_content_hash'], String) == encrypted_stored_content.hash,
+                                KnownTelegramMessage.deleted == False
+                            )
+                        ).all():
+                            await user_uploader_wrapper.delete_message(hint_message.message_id)
+                    except BaseException as e:
+                        make_log("Indexer", f"Error while deleting hint messages: {e}" + '\n' + traceback.format_exc(), level="error")
                 elif encrypted_stored_content.type.startswith('onchain') and encrypted_stored_content.onchain_index == item_index:
                     encrypted_stored_content.type = "onchain/content" + ("_unknown" if (encrypted_stored_content.key_id is None) else "")
                     encrypted_stored_content.owner_address = item_owner_address.to_string(1, 1, 1)