By default, Archicad 25 build 4013+ will create a new zone label every time user creates a new zone. To stop zone label to automatically generated
- Select the Zone Tool.
- Disable the “Place Label” in the “Annotation” section.

A newly created zone will not automatically place a new zone label anymore. If the zone stamp is not visible, please check the Model View Options.
Links : Indigo Figs Zone Stamp | Archicad