Consolidation of company codes under two different companies

Hi All,

I am getting the error:

A unique company code has not been assigned to Company XXX while posting intercompany invoice.

Posting Key

31 Vendor A/c (Company Code 1000)

40 Expense A/c (Company Code 1100)

Both the above company codes are assigned to Company 10000.

Now can I create and assign to different companies ?

Even after assigning these company codes to different companies will consolidated financial statements be available ?

Please help me with this 😔