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 ('25d1d4480f50ebd12b95984ed31d5a79', -1, 1542646438, 1542646438, '36a7702a', 20, 0, 0)

Line : 187
File : sessions.php