Fatal error when core module update

Hello!

I have FreePBX Distro v. 2.11.0.21

I’m trying to update Core module from v. 2.11.0.13 to 2.11.0.16 and got this message:

FATAL ERROR
UPDATE iax SET keyword = ‘transfer’, data = ‘no’ WHERE keyword = ‘notransfer’ AND LOWER(data) = ‘yes’ [nativecode=1062 ** Duplicate entry ‘tr-peer-5-transfer’ for key ‘PRIMARY’]SQL -
UPDATE iax SET keyword = ‘transfer’, data = ‘no’ WHERE keyword = ‘notransfer’ AND LOWER(data) = ‘yes’

And after this Core module says: Disabled; Pending upgrade to 2.11.0.16.
And many items in menu Applicalions don’t work.
Please! Help me. What can I do?

PS: Excuse me for my bad English (

sorry. solved by myself.