Map Database Full

[Valentijn]

After receiving a refurbished Garmin Etrex Touch 25 (because the on/off button of my Garmin had been broken), I got the message "Map Database Full" after starting the Garmin.
What does it mean?
Which action should I take to let it disappear?

 

[Nuvi-Nebie]

I am not sure what limit (if any) that your Garmin thinks if has reached, here is a list for the Etrex Touch 25 :-
https://support.garmin.com/en-GB/?faq=m1lBmDidNX8VV7Oc44vVZ8