Intercompany accounting line in Fixed Assets which is created from project module

Im seeing two additional intercompany accounting line apart from cost to cost clearing for the assets which are created from project module.

Project is of BU1 and Fixed Assets configuration is of BU2.

Here i understood that as this is cross BU, so intercompany line is getting generated. But i wanted to understand the source of this intercompany line.

Like how this CCID as getting captured.

Regards,

Hemanth B.T