Error: Entry index ##1 found in LFA1, LFB1, LFM1 Table after an error occurred in Business Partner creation for the site the issue can be resolved by archiving the ##1 Vendor entries from table LFA1, LFB1, LFM1 LFA1, LFB1, LFM1, etc are the table for vendor-specific data Do you want a detailed course on SAP MM click here

Check the plant and company code assignment. some of the tables might have not been updated properly. Also, Check the org structure elements Goto Home for detailed course on SAP IS Retail SAP MM Process Procurement etc.