Resolved! SLA Stage Moving to Cancelled instead of 'Paused 'When Incident is put in State 'On Hold'.
I have created few New SLAs referring to Incident Table , Issue is when Incident is put in On Hold state , new SLA is going to Cancelled stage every time instead of Paused stage. On other hand , OOTB SLAs are moving to Paused stage when INC is in On ...