Error When Sent Request To AWS - api

Question

I'm using AWS Lex API for sending message to Their Service (AWS Lex)
But it gives me an error
Concurrent Client Requests: Encountered resource conflict while saving session data
here is my code
user_id = params[:appUser][:_id]
intercept = Intercept.find_by_user_id(user_id)
begin
app_id = params[:app][:_id]
text = params[:messages][0][:text]
platform = params[:appUser][:clients][0][:platform]
status = params[:appUser][:devices][0][:active]
unless params[:appUser][:userId].nil? && params[:appUser][:userId].eql?("19980216")
CreateInterceptWorker.perform_async(app_id,status,platform,user_id)
end
CreateMessageUserWorker.perform_async(user_id,params[:messages][0][:name],text,params[:messages][0][:_id])
unless intercept.nil? || intercept.is_human.eql?(true)
bot = App.find_by_app_id(app_id).bot
publish_alias = bot.publish_aliases.last.name
response = #lex_runtime.post_text( bot_name: bot.name,bot_alias: publish_alias,input_text: text,user_id: user_id)
text_response = response.message
message_post_body = SmoochApi::MessagePost.new( text: text_response,role: 'appMaker',type: 'text')
binding.pry
result = #api_instance.post_message(app_id, user_id, message_post_body)
CreateMessageMakerWorker.perform_async(result.message.author_id,result.message.text,result.message._id,user_id)
end
rescue Exception => x
message_post_body = SmoochApi::MessagePost.new( text: x,role: 'appMaker',type: 'text')
result = #api_instance.post_message(app_id, user_id, message_post_body)
end