Added check for same uris in one batch and fixed ContentItem to Conce…

[flipsimon]

…pt relation bug

[Frando]

We really should have tests. I think your solution should work, but I am not super confident that simply dropping previous entities from is always correct.

Can you provide a test that fails without this change and passes with the change? This would be great to have. I have another idea for a fix, but would love to test it on an actual case that currently fails.

[flipsimon]

We really should have tests. I think your solution should work, but I am not super confident that simply dropping previous entities from is always correct.

Can you provide a test that fails without this change and passes with the change? This would be great to have. I have another idea for a fix, but would love to test it on an actual case that currently fails.

Working on a peertube test: #100
Postponed for now.