Master data conflict when merging 2 BW systems

Hello All,
We are currently merging 2 BW systems (one existing system and creating the objects of the other system in the new system) which are fed from 2 different source R3 systems. We have conflicts in master data number ranges between the 2 R3 systems. We explored the option of compounding , however in this case we need to delete the existing data in the BW system which is not plausible.
Have any of dealt with such a situation, if so please advise on the solution.Thanks in advance.
Regards,
Ashwin G

Hi KK,
We thought of that, but doing tht would result confusion to the end user as the material number would look different.
Thanks and regards,
Ashwin G

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