Environment (Required on creation): We are facing issue on Production Server , where user unable to start the process .This issue we faced when we tried to deploy new updated application changes on AZUR VM , 

error got : while ruining any processf low

{     "type": "ProcessEngineException",     "message": "Query return 2 results instead of max 1" }

Application Design is like below :
1:We used Camunda Standalone .war for weblogic server as our  application deployment server is weblogic and host on AZUR VMs.
2:Database :Our database in  oracle 11.g , hosted on AZUR we well.
3:Camunda Standlone.war applcationContext under webINF define the camunda Datasource tables.
4:We have another application war which we build on Java Jersey + Springboot , where we wrote on delegate base on BPM models.
5:Now we have another Application Rest war which called point 4 application war to generate workflow .
6:Now we are unable to run or generate workflow and complete the task as we are getting below error a:while running  work flow process :ProcessEngineException "
Query return 2 results instead of max 1"
b:while completing task: RestException "
Cannot complete task 5039521: Process engine persistence exception"
Note:5039521
Note :Application running based on design above to 1 year , issue come once we deployed the new application war .
Also we tried to revert our deployment to virtual war (last working) and same issue persist .
As of now Production environment is down, we need your team assist on this issue on urgent basis .
 
Sharing our contact email Ids Phones:
pd6080@att.com (4253816619) , ks589j@att.com(3145850782), pb5230@att.com
Also we can connect WebEx if needed :
https://attcorp.webex.com/join/pd6080
https://attcorp.webex.com/join/ks589j
 
Looking for your team assistant for quick resolution . 
 
Regards 
At&t developer