"You're trying to edit an outdated version of that page." when using the confluence json-rpc API

Question

I'm trying to use the storePage method to update a page. From reading the docs I came to understand that if I want to use storePage to update a page I need to provide the page id and the new version. But no matter what I try I seem to the this error about trying to edit an outdated version. There is currently only one version of the page... and nothing has it open to edit. Anybody got a clue what's going on?

Here's the JSON-RPC call I'm making:

[ {"space" : "AUTO", "title" : "APITest", "content" : "abba", "id":"34637287", "version":"2" }]

Anybody got any theories?

Sergey Svishchev · Accepted Answer

Send old version, Confluence will increment it itself.  (The error message could be clearer.)