Import scenario fails because of the limit on BOM ID number

Hi All, 

the BOM segment Key has been expanded to 30 character but looks like BOM seq number is still limited 15 character. we cannot use auto numbering and manual BOM ID should be in place as we are integrating with another system. how can I get over this limitation ? in my import scenario because it cut off the BOM ID it thinks it is looping. 

I need to use the full capacity of 30 char… any idea suggestion is greatly appreciated. 

Thanks 

Ghazal