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 ('6f4503f83fdd9ea1b4d95eef7fa489a6', -1, 1511473839, 1511473839, '36a2f128', 0, 0, 0)

Line : 189
File : sessions.php