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 ('166a1340e1307ee6fe1af762a5ed2f6f', -1, 1519538318, 1519538318, '365cc552', 54, 0, 0)

Line : 187
File : sessions.php