How to maintain relation field / join table when migrate from v3 to v4?


I’m doing migration from v3 to v4.
After v4 running all the data of single type and collection type still exists on the database except all the relation field in collection type has been removed by the system.
I try to look into the database and found all the join table from v3 has been remove and v4 seems create a new join table with different name rules then v3 was.

Is there any tips how to maintain relation data from v3 to v4 ?

did you use the the Migration Script to migrate the data?

Relations are stored in tables with the _link suffix in v4, which is different from v3.