mysql duplicate entry for cisco WLC

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Hi,

I was checking the control.log and I am seeing some errors coming from the WLC scraper.
What does it mean exactly? It complains about a duplicate entry, is it a duplicate entry for a mac address?
What can I do to fix this issue?

Fri Feb 8 12:25:26 2019: netdbctl(31683): DBD::mysql::st execute failed: Duplicate entry 'AUDIBXWLC-O-NETC2CDR402-ap39-o-l34-niv0-c7-d7-entafnam-0008.2265' for key 'PRIMARY' at /usr/lib/perl5/NetDB.pm line 2436.
Fri Feb 8 12:25:26 2019: netdbctl(31683): DBD::mysql::st execute failed: Duplicate entry 'AUDIBXWLC-O-NETC2CDR402-ap95-o-r1-8m15-bureau-synoptie-7028.8b22' for key 'PRIMARY' at /usr/lib/perl5/NetDB.pm line 2436.
Fri Feb 8 12:25:26 2019: netdbctl(31683): DBD::mysql::st execute failed: Duplicate entry 'AUDIBXWLC-O-NETC2CDR402-ap76-o-g-niv0-f20-profitrainin-88ae.078a' for key 'PRIMARY' at /usr/lib/perl5/NetDB.pm line 2436.
Fri Feb 8 12:25:26 2019: netdbctl(31683): DBD::mysql::st execute failed: Duplicate entry 'AUDIBXWLC-O-NETC2CDR402-ap76-o-g-niv0-f20-profitrainin-e4a7.a043' for key 'PRIMARY' at /usr/lib/perl5/NetDB.pm line 2436.
Fri Feb 8 12:25:26 2019: netdbctl(31683): DBD::mysql::st execute failed: Duplicate entry 'AUDIBXWLC-O-NETC2CDR402-ap11-o-L12-niv3-hallwaymanager-50c8.e5e5' for key 'PRIMARY' at /usr/lib/perl5/NetDB.pm line 2436.
...

thanks for any help!