[7.9.0] OptimisticCheckError: Object ChannelMetadata was updated outside of current transaction

[kozlovsky]

Traceback (most recent call last):, 
  File "lib\asyncio\events.py", line 81, in _run, 
  File "ipv8\taskmanager.py", line 131, in done_cb, 
  File "src\tribler-core\tribler_core\modules\metadata_store\gigachannel_manager.py", line 99, in check_and_regen_personal_channel_torrent, 
  File "ipv8\taskmanager.py", line 131, in done_cb, 
  File "src\tribler-core\tribler_core\modules\metadata_store\gigachannel_manager.py", line 85, in regenerate_channel_torrent, 
  File "<string>", line 2, in consolidate_channel_torrent, 
  File "lib\site-packages\pony\orm\core.py", line 515, in new_func, 
  File "src\tribler-core\tribler_core\modules\metadata_store\orm_bindings\channel_metadata.py", line 209, in consolidate_channel_torrent, 
  File "src\tribler-core\tribler_core\modules\metadata_store\orm_bindings\channel_metadata.py", line 207, in update_timestamps_recursive, 
  File "src\tribler-core\tribler_core\modules\metadata_store\orm_bindings\channel_node.py", line 220, in sign, 
  File "src\tribler-core\tribler_core\modules\metadata_store\orm_bindings\channel_node.py", line 182, in _serialized, 
  File "lib\site-packages\pony\orm\core.py", line 5472, in to_dict, 
  File "lib\site-packages\pony\orm\core.py", line 1896, in flush, 
  File "lib\site-packages\pony\orm\core.py", line 5421, in _save_, 
  File "lib\site-packages\pony\orm\core.py", line 5332, in _save_updated_, 
  File "lib\site-packages\pony\utils\utils.py", line 106, in throw, 
pony.orm.core.OptimisticCheckError: Object ChannelMetadata[75] was updated outside of current transaction. Changes: infohash (b'V\x1d\x7f\xef\xb3z{\x91::g>\xbe2\xc4\xfcO\xdb\xf2\x16' -> b'(\xbah\xf5\x1b3\xd1`x\xcd\xb2l\x0e\xc0\x90\xba\x8c3, 
\xdd'), torrent_date (datetime.datetime(2021, 5, 3, 4, 43, 48) -> datetime.datetime(2021, 5, 9, 16, 50, 46))

The reason is incorrect db_session handling in regenerate_channel_torrent, I'll fix this.

[sentry-for-tribler]

Sentry issue: TRIBLER-53

[sentry-for-tribler]

Sentry issue: TRIBLER-LEGACY-AF