I have a Bill of Materials (BOM) for Table, which includes a BOM item called Channel. 

I tracked my channels using lots, so I have some channels from lot 1 and some from lot 2. 

When I created BOMs for 15 tables, I picked channels from both lot 1 and lot 2. 

Later, when I attempted to assign serial numbers to the tables by clicking the mass production button, I encountered the following error: 

'Component Lots must be unique for mass production. Please review reservation for: 

Channel'." 

This is most basic scenario for manufacturing company, can anyone please guide me on this.