Duplicate entry on Upgrade 1.9.1 to 2.0.15

Hello. I've been trying to install CB 2.0.15 onto our test system, but it is failing with the message below. It seems to be plugin-related, but I have unpublished all non-core plugins before installing. I would be grateful for guidance as to what the problem might be.

Thanks

Jim

Failed
001_pkg_communitybuilder_2.0.15+build.2016.10.19.00.52.13.e6ea91d01.zip
Log hide
001_pkg_communitybuilder_2.0.15+build.2016.10.19.00.52.13.e6ea91d01.zip is being installed.
001_pkg_communitybuilder_2.0.15+build.2016.10.19.00.52.13.e6ea91d01.zip failed to install! hide
Duplicate entry '17' for key 'PRIMARY' SQL=INSERT INTO `#__comprofiler_plugin` (`id`,`name`,`element`,`type`,`folder`,`viewaccesslevel`,`backend_menu`,`ordering`,`published`,`iscore`,`client_id`,`checked_out`,`checked_out_time`,`params`) VALUES (17,'CB Articles','cbarticles','user','plug_cbarticles',1,'',8,1,1,0,0,'0000-00-00 00:00:00',''), (18,'CB Forums','cbforums','user','plug_cbforums',1,'',9,1,1,0,0,'0000-00-00 00:00:00',''), (19,'CB Blogs','cbblogs','user','plug_cbblogs',1,'',10,1,1,0,0,'0000-00-00 00:00:00','')
Package Install: There was an error installing an extension: com_comprofiler.zip
Installer is uninstalling.
Installer uninstalled successfully.

I highly recommend searching our forums as we've gave ample advice on how you should migrate and what problems you'll face. This error has been answered below.

www.joomlapolis.com/forum/255-developer-members-support/232775-error-after-upgrade-cb-1-9-to-cb-2-0-13#277607

OK thanks - sorry about not finding the previous answers on the forums - I'm normally very conscious of this, but I must have been searching incorrectly or poorly!

I have previous backups available and will sort out the auto-increment and try again.

Jim