How to fix «There is no public key available for the following key IDs: EF0F382A1A7B6500» on Debian?

Unix Debian
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1

Ign http://repo.mysql.com jessie/mysql-5.7 Translation-en
Ign http://repo.mysql.com jessie/mysql-apt-config Translation-en
Fetched 33.1 kB in 5s (6,025 B/s)
W: There is no public key available for the following key IDs:
EF0F382A1A7B6500

2 
apt-get install debian-keyring debian-archive-keyring

forums.debian.net/viewtopic.php?f=17&t=133476#p646985