Do I need to transfer my DTV stamp from my old passport to my new one when in Thailand?

The user is currently in Thailand on a DTV visa and has renewed their passport. They ask if they need to visit the immigration office to transfer their DTV stamp from the old passport to the new one. Community responses indicate that the transfer is necessary, and it is important to carry both the old and new passports when visiting immigration. The old passport will become invalid, but updates and transfers can be facilitated at the immigration office where they will provide further instructions and necessary forms.