I don't know about Phuket DLT, our local DLT in Suk checked my bike over by inspection after being off road for 6•1/2 years ended putting all the details in a new ordered book from the old one that was falling to bits and ordered a new number plate changing the Kho Samui one to Sukhothai.
No problem at all not much cost involved.
Inspection, new book ordered, new number plate, 7 years back road tax, new road tax disc and CTPL govt insurance.