[influxdb] Add info that it's no good idea to override the item tag via metadata...

* add info that it's no good idea to override the item tag via metadata

closes #11288

Signed-off-by: Matthias Glaub <magl@magl.net>

diff --git a/bundles/org.openhab.persistence.influxdb/README.md b/bundles/org.openhab.persistence.influxdb/README.md
index bfc077a55334ad9c6bab567c40e1f3c2915c5c4d..449903b460c8ef976ad59708f3b858876332b394 100644 (file)
--- a/bundles/org.openhab.persistence.influxdb/README.md
+++ b/bundles/org.openhab.persistence.influxdb/README.md
@@ -93,6 +93,8 @@ temperature,item=tempBath,floor=firstfloor
 
 You can now easily select all temperatures of the firstfloor or the average temperature of the groundfloor.
 
+*Warning: Do **not** override the tag `item` within the metadata. This tag is used internally by openHAB and changing it will lead to problems querying the persisted datapoints.*
+
 #### Extended automatic tagging
 
 Besides the metadata tags, there are additional configuration parameters to activate different automatic tags generation.