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 ('6b2947a588da8b5062535c5a4231fa8f', -1, 1526976240, 1526976240, '36c45659', 4, 0, 0)

Line : 187
File : sessions.php