Product master numbering in EWM has additional @EWM100 compated to material master in ECC

Dear all,

Material master in ECC when transported to EWM, product master created adds @EWM to the material master.

Example - Material master 1234 in ECC becomes 1234@EWM100.

Do you know why? How to get rid of it so that material master in ECC and product master in EWM is exactly same.

Thanks,

Chaitanya