Will it be any issue for keeping with (1) and how to revert it without (1)
it is expected and normal behavior. You SHALL NOT do anything with this or try to revert to a file name without (1). The number in parenthesis indicates the key index for which the CRL is created. In CDP folder (default it is CertEnroll) you will find at least 4 CRLs for this CA: without (1) and with (1). First CRL pair is signed with original key pair, second CRL pair is signed with renewed key pair.
its my production enviroment.
then don't do anything and keep it running.