Will need to delete the traces of them in Settings -> Data Management.
If you want to try to install them again, make sure your Sigpatches are up to date.
Sigpatches (GBATemp) — get your Sigpatches here!
E: another common thing that happens is the base game isn’t installed but rather an update or DLC. Double check your source.
E2: when in doubt, try another installer to check your sanity.
Installers
- Tinfoil — Polished installer. Recommend the Self installing version.
- DBI — Capable feature filled and fast installer.
- Tinwoo — A nice installer for when you just want to install.
- Goldleaf — The kitchen sink but it can also install games.