Yes, because you have a new player ID you will need to reconnect your Caesars Rewards® account to your new WSOPonline.com account.
Visit the link below to connect your two accounts; please be advised you will need your player ID number which can be found by logging to your WSOPonline.com account, going to ‘My account’ and clicking on ‘Personal Details.’ Your player ID number is also your Support ID number.
https://www.wsoponline.com/caesars-rewards/nv/
No matter what day of the month you link your account, you will receive Tier Credits offline for every Action Player Point you earned online within that given month. Tier Credits earned within a given month, based on online play, will be credited by the second week of the following month. For more details about WSOP.com and Caesars Rewards® connections visit:
https://www.wsoponline.com/caesars-rewards/nv/