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 ('407d6443dfffa0548b52f8e9cdfbc093', -1, 1542491269, 1542491269, '365ab978', 18, 0, 0)

Line : 186
File : sessions.php