With the successive decisions made explicit (so, more clearly structured):
Plantuml-code used
<style>
activityDiagram {
BackgroundColor #lightblue
}
document {
BackgroundColor transparent
}
diamond {
BackgroundColor #white
}
</style>
:Create;
repeat
:Discussion;
backward:Update;
repeat while (feedback?) is ( yes)
if () then (accept)
:Merge;
else ( denied)
endif
:Close;
:Delete;