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 ('7ea0f9d13ac24b5762c12ad5e7810b97', -1, 1540180096, 1540180096, '3691534f', -8, 0, 0)

Line : 187
File : sessions.php