Channel Alignment Failure without oversampling

I am using a LimeSDR USB-A.

When I set the sample rate as follows with an oversampling rate of 2 as follows:

LMS_SetSampleRate(reader->device, 2109375, 2)

And everything works correctly. But if I want to get rid of oversampling as follows:

LMS_SetSampleRate(reader->device, 2109375, 1)

My program starts outputting the error “Channel Alignment Failure”.

Please advise