Issue Merging

[kavielteo]

All the messages were retrieved. Backing up data into the database...

N/A% (0 of 39966) | | Elapsed Time: 0:00:00 ETA: --:--:--
Something went wrong in Telegram's side. This is the full exception:

'NoneType' object has no attribute 'mime_type'
This part of the process can't be recovered. You must start from scratch.

You can report this issue at https://github.com/TelegramTools/TLMerger/issues/new. Please, give as much details as possible of the error message and attach the 'TLMerger-log.log' file, as all the detailed information about the bug has been written there.

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