Removal of 'wrong' value for rain

[Toulon7559]

After upgrade yesterday of the RFLinkGateway-firmware to R46, Domoticz for the WS7000-raingauge shows a value of 146 in the 'last7days'-graph.
This value popped up at the time of activation of the new firmware. The very high value 'explodes' the scaling of the Y-axis, making lower values invisible.
Because rain gauges usually report the accumulated value (expecting that the receiver calculates the incremental increase/time), probably this 146 is the accumulated rain over the preceeding period (before the upgrade of the firmware).

The usual trick to put the cursor on the value in the graph plus Shift+Left-click, does not work for quick removal.
How to remove this 'wrong' value, easier than going to the SQL-database for modification of stored value(s)?

Related observations:
1) The read-out from the TFA_Nexus rain gauge is similar and must have happened at the same time, but does not show this 'hick'. Strange .....
2) When trying various methods for correction (related to the above aspect), also detected that for expanded view of the rain graphs you cannot apply the zoom-function applicable for temperature-graphs etc. Is that correct? An alternative way available to expand a section of the 'rain-graph'?

[stlaha2007]

If you're referring to the short log (last day/24hours) then wait for the time (as in a day) to expire. Then you can easely shift-click in the month or year graph to remove that day value.