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 ('9a3f236b78ba2d3092d6df73f139a7e9', -1, 1503406736, 1503406736, '36c46576', 17, 0, 0)

Line : 187
File : sessions.php