phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('bcf61ba6b2b4d1ad75d4ae8b0b2455a1', -1, 1537512036, 1537512036, '36c6cd99', -8, 0, 0)

Line : 187
File : sessions.php