Welcome to the community @Byron and great to hear that you enjoy n8n!
Yes, it sounds like it. There are no log-files. The logs get saved in a database. So you would have to delete them there. The easiest way to do that and to also make sure that it does not get that far again in the future is to set some environment variables so that n8n automatically deletes old executions:
// Activates automatic data pruning
// Number of hours after execution when they should be deleted, by default 14 days
So if you set them and then restart n8n it should on startup run the first prune.
If you run n8n with SQLite, you will however see is that the disc-space will not be freed up. The reason for that is that SQLite does sadly not do that automatically. Therefore you have to VACUUM it manually. An example, how to do that can be found here:
The SQLite file you will find under this location: