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 ('ca55f4f5a77b3c70bd8e5c4797a46be0', -1, 1539592191, 1539592191, '365ca077', -11, 0, 0)

Line : 187
File : sessions.php