CMakeCache.txt-Error when trying to build Firmware

I followed this guide for downloading the firmware. Starting a simulation with make px4_sitl gazebo still worked at this point.
Then, as described here, I successfully built the project from VsCode.
Now, whenever I try to start a simulation, either from the VsCode debugger or from the terminal, I get the following error:
[cmake] CMake Error: The current CMakeCache.txt directory /workspaces/PX4-Autopilot/build/px4_sitl_default/CMakeCache.txt is different than the directory /home/jan/dat/Seminararbeit/drone/PX4-Autopilot/build/px4_sitl_default where CMakeCache.txt was created. This may result in binaries being created in the wrong place. If you are not sure, reedit the CMakeCache.txt
(/home/jan/dat/Seminararbeit/drone/PX4-Autopilot/ is the directory where the Firmware is located)