diff --git a/docs/8.0/ayanova/docs/api-error-codes.md b/docs/8.0/ayanova/docs/api-error-codes.md
index 1ca0c7ec..f25d6898 100644
--- a/docs/8.0/ayanova/docs/api-error-codes.md
+++ b/docs/8.0/ayanova/docs/api-error-codes.md
@@ -15,20 +15,17 @@ Here are all the API level error codes that can be returned by the API server:
 | 2002 | Internal error from the API server, details in [server log](common-log.md) file |
 | 2003 | Authentication failed, bad login or password, user not found |
 | 2004 | Not authorized - current user is not authorized for operation attempted on the resource (insufficient rights) |
-| 2005 | Object was changed by another user since retrieval (concurrency token mismatch) |
+| 2005 | Object was changed by another user since retrieval (concurrency token mismatch).  A record was attempted to be saved but another user has just modified it so it's invalid. (first save "wins") |
 | 2010 | Object not found - API could not find the object requested |
 | 2020 | PUT Id mismatch - object Id does not match route Id |
 | 2030 | Invalid operation - operation could not be completed, not valid, details in message property |
-| 2200 | Validation error - general top level indicating object was not valid, specifics in "details" property |
+| 2200 | Validation error - general issue with object overall not valid, specifics in "details" property |
 | 2201 | Validation error - Field is required but is empty or null |
 | 2202 | Validation error - Field length exceeded. The limit will be returned in the `message` property of the validation error |
 | 2203 | Validation error - invalid value.  Usually an type mismatch or a logical or business rule mismatch (i.e. only certain values are valid for current state of object) |
 | 2204 | Validation error - Customized form property set to required has an empty value |
 | 2205 | Validation error - Required property is missing entirely. Usually a development or communications error |
 | 2206 | Validation error - A text property is required to be unique but an existing record with an identical value was found in the database |
-
-| StartDateMustComeBeforeEndDate | When an object requires a start and end date the start date must be earlier than the end date |
-| InvalidValue | Generic error indicating an input object's property is not set correctly |
-| ReferentialIntegrity | Indicates modifying the object (usually a delete) will break the link to other records in the database.  The other records need to be modified before continuing |
-| InvalidOperation | Indicates the operation is invalid, details provided in the `message`  |
-| NotChangeable | Indicates the attempted property change is invalid because the value is fixed and cannot be changed  |
\ No newline at end of file
+| 2207 | Validation error - When an object requires a start and end date the start date must be earlier than the end date |
+| 2208 | Validation error - Modifying the object (usually a delete) would break the link to other records in the database and operation was disallowed to preserve data integrity |
+| 2209 | Validation error - Indicates the attempted property change is invalid because the value is fixed and cannot be changed  |
\ No newline at end of file
diff --git a/server/AyaNova/ControllerHelpers/ApiErrorCode.cs b/server/AyaNova/biz/ApiErrorCode.cs
similarity index 90%
rename from server/AyaNova/ControllerHelpers/ApiErrorCode.cs
rename to server/AyaNova/biz/ApiErrorCode.cs
index e0dd1aee..144c373d 100644
--- a/server/AyaNova/ControllerHelpers/ApiErrorCode.cs
+++ b/server/AyaNova/biz/ApiErrorCode.cs
@@ -5,7 +5,7 @@ using System.Linq;
 using System.Collections.Generic;
 
 
-namespace AyaNova.Api.ControllerHelpers
+namespace AyaNova.Biz
 {
 
 
diff --git a/server/AyaNova/biz/BizObject.cs b/server/AyaNova/biz/BizObject.cs
index 8a382e26..36474188 100644
--- a/server/AyaNova/biz/BizObject.cs
+++ b/server/AyaNova/biz/BizObject.cs
@@ -58,7 +58,7 @@ namespace AyaNova.Biz
 
         }
 
-        public void AddError(ValidationErrorType errorType, string propertyName = null, string errorMessage = null)
+        public void AddError(ApiErrorCode errorType, string propertyName = null, string errorMessage = null)
         {
 
             _errors.Add(new ValidationError() { ErrorType = errorType, Message = errorMessage, Target = propertyName });
diff --git a/server/AyaNova/biz/ValidationErrorType.cs b/server/AyaNova/biz/ValidationErrorType.cs
index ec7f488c..124522d5 100644
--- a/server/AyaNova/biz/ValidationErrorType.cs
+++ b/server/AyaNova/biz/ValidationErrorType.cs
@@ -6,11 +6,11 @@ namespace AyaNova.Biz
         Now_api_code_2201_RequiredPropertyEmpty = 1,
         Now_api_code_2202_LengthExceeded = 2,
         Now_api_code_2206_NotUnique = 3,
-        StartDateMustComeBeforeEndDate = 4,
-        InvalidValue = 5,
-        ReferentialIntegrity = 6, 
-        InvalidOperation = 7,
-        NotChangeable=8,
+        Now_api_code_2207_StartDateMustComeBeforeEndDate = 4,
+        Now_api_code_2203_InvalidValue = 5,
+         Now_api_code_2208_ReferentialIntegrity = 6, 
+        Now_api_code_2030_InvalidOperation = 7,
+        Now_api_code_2209_NotChangeable=8,
         Now_api_code_2205_RequiredPropertyMissing = 9,
         Now_api_code_2204_CustomRequiredPropertyEmpty = 10