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 ('9b05df7e427b5a979e81f8cccc3a37bb', -1, 1542231564, 1542231564, '36a712aa', -4, 0, 0)

Line : 187
File : sessions.php