Liveries tend to include more files than needed. One file, the panel.cfg, along with information about what electronics are being used, also contains the info for the tail number. Liveries that are wanting to either change the color, or remove it altogether for painted on numbers, will contain a whole copy of this file, that is based off of the original version.
The problem comes from this as the panel.cfg for this plane is completely different and has additional lines that won't be in the one in a livery.
If you need assistance with editing a livery, please join us on the official WB-Sim discord https://discord.gg/GwGU3QDHHF where there is a "how to" on the subject and I can provide extra help if needed.