[Xymon] non-green view shows purple status

[deepak deore]

All non-green view shows purple status for one of my custom column. But
when I click on it, then it shows green and I see the date & time is
updated on browser which mean that the data is receiving on time at xymon
end.

I need to drop that column and then it comes back to green again. Where
should I look to avoid drop always which deletes the history also.
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