Excessive Number of maps in wp_agm_maps

Somehow, I have some 75000 maps in my database by subtracting the first id in the table from the last. The db shows:
wp_agm_maps 98,111 - Anyway, that's a lot. And many of them appear to be pointless, like "Unnamed Road".

I can't even get a good export of the database, because the wp_agm_maps table is 60 MB.

What is the point of all these maps, which for most users won't be used?
Can I empty this table? And some how keep it empty (assuming all my maps are auto-generated)?