Transporting project systems drill down report

Hello All,

I have issue when we are transporting the project systems standard drill down report variant of other system are got overwritten.

For example We have changed the standard report 12KST1A (S_ALR_87013558) output type and want to transport from one development system to another development system but while transporting variant created in receiver development system are got overwritten.

Please let me know if there is any way to transport the PS drill down report or how to transport PS report.

Thank you

Himansh