Has your base been destroyed during a raid on Palworld or it was simply burn to a crisp? Incineram has an ability that sets wooden foundations on fire, so if all your base is connected with these foundations the whole base will burn down. In order to avoid the base getting burned down or destroyed in Palworld you need to either make a stone foundation or in case of playing in a dedicated server change your settings on PalWorldSettings.ini to BuildObjectDamageRate=0.000000 and, in case you want to keep the build objects outside of the line of the base change BuildObjectDeteriorationDamageRate=0.000000 as well.

So this is how you can keep your base for longer, either don’t connect everything to wooden foundations, wait for stone foundations to link everything or change the PalWorldSettings.ini file if on a dedicated server of Palworld.