Hi... and welcome back :-) 
1) Please do us a favour and keep your changesets 'local'. This means: save your changes befor editing in another area.
2) are you sure you didn't mean leisure=picnic_table instead of so many picnic_sites? 
Please review your changes.
Cheers and have fun :-)
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            #REVIEWED_BAD #OSMCHA
            Published using OSMCha: https://osmcha.org/changesets/156324329
            