The problem with the EG12-EA modem

IoT Modules LTE-A Module
1

Good afternoon!
After the update, there was a problem connecting to the carrier. I see messages in the logs:
lte 1 mbim: error: invalid transaction #185
lte 1 mbim: error: invalid transaction #170.
Firmware version: EG12EAPAR01A15M4G_01.201.01.201
Please help me solve the problem.

2

The modem is used for personal purposes (not an industrial environment). Please help me roll back the firmware to the working version.