Currently upgrading from 6.2.0 to 7.1.8. and I am stuck.
During the upgrade installer I have been shown a dialog window saying
Major version upgrade from 6.2.0 to 7.1.8
There were 1 issue detected
Property Editor with ID 'c2d6894b-e788-4425-bcf2-308568e3d38b' (assigned to Data Type 'Multinode Picker') does not have a valid GUID -> Alias map. It will be replaced with a Readonly/Label property editor. The following compatibility issues were found. If you continue all non-compatible property editors will be converted to a Readonly/Label. You will be able to change the property editor to a compatible type manually by editing the data type after installation.
The installer is giving me the option to continue or fix it before I continue,
can some one explain why I am getting this message and how to fix it?
Thanks Ayo
'Multinode Picker' is incompatible with the new version of Umbraco. You are getting this warning because one or more property editors is using this data-type.
Umbraco's default behavior when you select 'Continue' is to simply replace the the data type with a noedit label.
After the conversion, you can go to Developer > Data types, and find the multinode picker. In the dropdown it will probably be set as 'noedit' now. I believe you should set it to Multi-Node Treepicker manually.
If I recall correctly, the Multi-node Treepicker stores the selected nodes in the same CSV format as the old version, so you shouldn't lose any data... I think :)