I am using CUCM 10.5 i have configured new Cluster and one PUB and one SUB made some configurations and also configured some devices when i change Line id of any device then it gives me error ( the attempted action was a violation of security protocols and will be allowed, this may be caused by having multiple concurrent windows open or using browser buttons (back, refresh, etc) pleas retry the operation) i have closed all additional tabs, explorers, even clear complete cache and saved passwords then i try to change Line id its gives me the same error please help me to resolve this issue am planning to put the same server into production.
