[Amazon Keyspaces] Different types of operations on same column not supported

We are using Amazon Keyspaces with Django & Django Cassandra Engine. In one of our table we have a column defined as a list (called 'date_list')

We do insert, update, delete without any issue. However sometimes we get this issue and we didn't find help on this:

Error from server: code=2200 [Invalid query] message="Different types of operations (Prepend, Addition) on same column (date_list) is not supported"

How to solve this issue ?