The release of the basis types cannot be reset

Hello All,

I am getting error while cancelling the release of basic type in WE30.

The release of the basis types cannot be reset

Message no. EA506

Diagnosis

The release can only be reset if the basis type has been released in the current Release. Basis type ZEQUIP has already been released in Release 731, so this release can no longer be removed.

Procedure

Create a successor to basis type ZEQUIP so this new basis type can be further developed.

Can anyone please provide me the solution for this?