diff --git a/app/api/routes/content.py b/app/api/routes/content.py
index c76e9d4..df99c8c 100644
--- a/app/api/routes/content.py
+++ b/app/api/routes/content.py
@@ -75,7 +75,7 @@ async def s_api_v1_content_view(request, content_address: str):
                     invoice_url = await Bot(token=CLIENT_TELEGRAM_API_KEY).create_invoice_link(
                         'Lifetime access to content',
                         'You will receive NFT with lifetime access to content',
-                        f"access_{invoice_id}", "", "XTR",
+                        invoice_id, "", "XTR",
                         [
                             types.LabeledPrice(label='Lifetime access', amount=stars_cost),
                         ],
@@ -94,10 +94,11 @@ async def s_api_v1_content_view(request, content_address: str):
                 except BaseException as e:
                     make_log("Content", f"Can't create invoice link: {e}", level='warning')
 
-            opts['invoice'] = {
-                'url': invoice_url,
-                'amount': stars_cost,
-            }
+            if invoice_url:
+                opts['invoice'] = {
+                    'url': invoice_url,
+                    'amount': stars_cost,
+                }
 
     display_options = {
         'content_url': content['decrypted_content'].web_url + (
diff --git a/app/core/background/convert_service.py b/app/core/background/convert_service.py
index 8d544b8..3fd6d1f 100644
--- a/app/core/background/convert_service.py
+++ b/app/core/background/convert_service.py
@@ -119,7 +119,7 @@ async def convert_loop():
             file_hash = hash_stdout.decode().split()[0]
             file_hash = b58encode(bytes.fromhex(file_hash)).decode()
 
-            if not db_session.query(StoredContent).filter(
+            if not session.query(StoredContent).filter(
                 StoredContent.hash == file_hash
             ).first():
                 new_content = StoredContent(