We designed a portal with SharePoint 2013 and Project 2013 and we have more than 60 custom lists and 10 Doc Libraries and more than 10 thousand items and docs there, but we haven't any tasks list there.
Last month I created tasks list like: /lists/tasks , When republished specific project in Project Server, this list synced again and deleted all of the items. (recycle bin didn't work, no versioning but cmp and backup scenario helped us to revert it back again)
Then I think since "Tasks" is a default SharePoint name in team sites, we created: /lists/task2 and deleted the last one.
But after re-Publishing only one of those projects (specific project), sync fired again, and deleted all items.
Problem is only about one project file in project server, and we have no similar problem about republishing 10 other projects.
Where is the mistake?