Change Collation After setting up Always On Availability Group

Hi

I have a problem and I don't know what is the best solution.

I have set up Always On Availability Group with 2 nodes on SQL Server 2017. Default server collation of the previous sql server (2005) was "SQL_Latin1_General_CP1256_CI_AS". I used "Arabic_CI_AS" as server collation which results in conflict between user databases' collation and tempDB collation.

I don't know if it's better to:

1- Change the server collation to "SQL_Latin1_General_CP1256_CI_AS"

or

2- Change user database collation to "Arabic_CI_AS"

I red some instructions to change server collation on Always On AG and it seems i have to remove Listener and AG (Which i prefer not to). But I couldn't find any instruction to change the database collation in Always On AG.

I Appreciate your help as it's the production server and we have some problems in our software due to his conflict.