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 ('4709c91d983e1d5860d79e9f8b0d23cd', -1, 1519467021, 1519467021, '36c49118', 1, 0, 0)

Line : 187
File : sessions.php