[Building Sakai] Problem with disappearing toll configurations

[Laurent Danet]

Hi

I need some help. We tried to update tool configurations (properties) 
with a quartz job. (For example: in tool sakai.synoptic.announcement we 
set properties days to 31).

But these configurations disappear. We have  4466 row in 
sakai_site_tool_property  table in day 1, 2679  in day 4 and  2143 in 
day 8.

We run sakai 2.7.1.

Is there an explanation for this comportment ?

Thanks for your help.

Laurent
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