How do we merge our COGS account with the COGS account Quickbooks creates on it's own. We have merged, deleted, renamed, etc.

The integrator we paid a crapton of money to, set up the COA with a COGS account (50000), and quickbooks comes behind it, and indexes to the next COA number (50001) for its "*COGS" account.

Can we renumber this (to 50000) or is it too late?