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 ('542754e739f8814dea0e9b5ca7f6784d', -1, 1527102024, 1527102024, '3651b7b7', -4, 0, 0)

Line : 189
File : sessions.php