Check if a duplicate series number exists in document numbering (NNM1 table). Upgrade to 8.8 will fail if this inconsistency exists

All Everybody,

When I am upgrading SAP Business One 8.82 PL04 to PL11 I am getting this error message.

Please provide me solution on it As early as possible.

If there is need to raise ticket to SAP Please give me instruction for How to do it?

Regards,

Ajit