Warning: Unknown: open(/tmp/sess_8fb8d90a8541d623ab5f8069ed4c0838, O_RDWR) failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

sitemde en altta bu çıkıyor resim ekleyemiyorum ve anasayfada resimler görünmüyor nedir bu blen varmı ?