diff --git a/lib/channelengine_channel_api_client_ruby/models/channel_product_extra_data_item_response.rb b/lib/channelengine_channel_api_client_ruby/models/channel_product_extra_data_item_response.rb
index 5227c9c..72704ba 100644
--- a/lib/channelengine_channel_api_client_ruby/models/channel_product_extra_data_item_response.rb
+++ b/lib/channelengine_channel_api_client_ruby/models/channel_product_extra_data_item_response.rb
@@ -136,8 +136,8 @@ def key=(key)
     # Custom attribute writer method with validation
     # @param [Object] value Value to be assigned
     def value=(value)
-      if !value.nil? && value.to_s.length > -1
-        fail ArgumentError, 'invalid value for "value", the character length must be smaller than or equal to -1.'
+      if !value.nil? && value.to_s.length < -1
+        fail ArgumentError, 'invalid value for "value", the character length must be bigger than -1.'
       end
 
       @value = value