ResourceConflictException occur when deploying lambda function

trying to update boto3 SDK in lambda functions.
I'm getting this error when trying to deploy lambda function:

"An error occurred (ResourceConflictException) when calling the
UpdateFunctionConfiguration operation: The operation cannot be performed at
this time. An update is in progress for resource: arn:aws:lambda:xxxxxxx"

I tried checking function state and it returns {Active, Successful}.

what could be the possible cause of this error? Can anyone help us resolve this issue? we are using chalice for deployment.