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 ('52e5c472bfdfadf48c8df8a584e5ac4c', -1, 1500913870, 1500913870, '36c693dd', 0, 0, 0)

Line : 172
File : sessions.php