Error while decoding MB 75 39?

Hello,
I receive an repetitive error message:
Here is the error message:

Logger: libav.h264
Source: components/stream/worker.py:79
First occurred: 11:26:54 (56 occurrences)
Last logged: 13:57:11

error while decoding MB 75 39
cbp too large (125) at 57 1
error while decoding MB 57 1
negative number of zero coeffs at 41 0
error while decoding MB 41 0

What can I do ???

Many thanks for your help.

Regards
Thierry