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 ('d544b8f8febf3c46e7a47fdefe6e8b7c', -1, 1524623958, 1524623958, '36c64e79', -4, 0, 0)

Line : 187
File : sessions.php