sidecar: Constant 409 update in progress bug

We’re facing a very strange issue which is constantly breaking out deploys.

We have to manually delete all the Lambda’s before trying to deploy, otherwise we encounter the following:

Error executing "UpdateFunctionCode" on "https://lambda.***.amazona  
  ws.com/2015-03-31/functions/SC-Appname-staging-Sidecar-Dacast-CreateLivestrea  
  m/code"; AWS HTTP error: Client error: `PUT https://lambda.***.amazon  
  aws.com/2015-03-31/functions/SC-Appname-staging-Sidecar-Dacast-CreateLivestre  
  am/code` resulted in a `409 Conflict` response:                              
  {"Type":"User","message":"The operation cannot be performed at this time. A  
  n update is in progress for resource: arn:aws (truncated...)                 
   ResourceConflictException (client): The operation cannot be performed at t  
  his time. An update is in progress for resource: arn:aws:lambda:***:6  
  88009524528:function:SC-Appname-staging-Sidecar-Dacast-CreateLivestream - {"T  
  ype":"User","message":"The operation cannot be performed at this time. An u  
  pdate is in progress for resource: arn:aws:lambda:***:688009524528:fu  
  nction:SC-Appname-staging-Sidecar-Dacast-CreateLivestream"}   

We’re a bit lost here, is there anything we’re doing wrong? We have changed our Sidecar implementation in the last 3 months, it just started happening 4 days ago and it’s becoming a hair puller.

Any guidance?