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 ('81acd6653cff7ce78983ffa52592cd2a', -1, 1524531729, 1524531729, '3650738c', -2, 0, 0)

Line : 187
File : sessions.php