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Trying to fix "Write operations are not allowed in read-only mode (FlushMode.MANUAL)" error

Posts: 5
Android Spring Ubuntu
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I am having fun with Spring Rest and Hibernate on the server side and Android on the client side.
If I am calling methods that use the request method GET, i do get information from server, else if I try to call POST methods, to add an entity in a database, i only get this error:

It drives me a bit crazy because i can't figure out what i am doing wrong here. I've done this before and it worked just fine. Please if you have the time take a look, i need a fresh pair of eyes to look at the code.
This is my controller method:

In persistence.xml i specify:

Why do i keep getting this error if i already specify the flush mode? I have no annotation for transactions:() on my service implementation class, or anywhere else regarding my controller.

Any help would be great, thank you.
Yeah. What he said. Totally. Wait. What? Sorry, I was looking at this tiny ad:
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