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 ('51c15f90ad6fc6dd3aec896050f5c417', -1, 1566626163, 1566626163, '23ad30e0', 60, 0, 0)

Line : 187
File : sessions.php