diff --git a/devdocs/todo.txt b/devdocs/todo.txt
index 869546b2..49814925 100644
--- a/devdocs/todo.txt
+++ b/devdocs/todo.txt
@@ -32,6 +32,7 @@ IMMEDIATE ITEMS:
 	- Tag groups (modify tags already coded)
 		- X Modify tag to bring combined list of groups with tag picklist (NOPE, let the UI query both separately and integrate them at the UI level)
 		- Modify tag to remove itself from tagroupmap if deleted
+		- Tag: add test for untag everything
 	- Retag: code to tag an item should take into account if it's already tagged and not make a new record, just return existing
 	- Localized text
 		- ** DEVISE a system to ensure no unused keys are brought forward to raven
diff --git a/server/AyaNova/Controllers/TagController.cs b/server/AyaNova/Controllers/TagController.cs
index 555cfe92..90a3e165 100644
--- a/server/AyaNova/Controllers/TagController.cs
+++ b/server/AyaNova/Controllers/TagController.cs
@@ -316,6 +316,56 @@ namespace AyaNova.Api.Controllers
         }
 
 
+        /// <summary>
+        /// Untag all objects with this tag
+        /// Required roles: BizAdminFull, DispatchFull, InventoryFull, TechFull, AccountingFull   
+        /// </summary>
+        /// <param name="id"></param>
+        /// <returns>Ok</returns>
+        [HttpDelete("{id}")]
+        public async Task<IActionResult> UnTagEverything([FromRoute] long id)
+        {
+
+            if (!serverState.IsOpen)
+            {
+                return StatusCode(503, new ApiErrorResponse(ApiErrorCode.API_CLOSED, null, serverState.Reason));
+            }
+
+            if (!ModelState.IsValid)
+            {
+                return BadRequest(new ApiErrorResponse(ModelState));
+            }
+
+            var dbObj = await ct.Tag.SingleOrDefaultAsync(m => m.Id == id);
+            if (dbObj == null)
+            {
+                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));
+            }
+
+            if (!Authorized.IsAuthorizedToModify(HttpContext.Items, AyaType.Tag, dbObj.OwnerId))
+            {
+                return StatusCode(401, new ApiNotAuthorizedResponse());
+            }
+
+            var UserId = UserIdFromContext.Id(HttpContext.Items);
+
+            //Instantiate the business object handler
+            TagBiz biz = new TagBiz(ct, UserId, UserRolesFromContext.Roles(HttpContext.Items));
+
+            //NOTE: ct.SaveChanges not required after this call 
+            //Delete will look after it as it also needs to delete related records manully that are not mapped in EF Core
+            if (!biz.Delete(dbObj))
+            {
+                return BadRequest(new ApiErrorResponse(biz.Errors));
+            }
+
+            //Log
+            EventLogProcessor.AddEntry(new Event(UserId, id, AyaType.Tag, AyaEvent.TagMassUntag), ct);
+            await ct.SaveChangesAsync();
+
+            return NoContent();
+        }
+
 
         /// <summary>
         /// Delete Tag
diff --git a/server/AyaNova/biz/AyaEvent.cs b/server/AyaNova/biz/AyaEvent.cs
index 05ce08d6..8275fff1 100644
--- a/server/AyaNova/biz/AyaEvent.cs
+++ b/server/AyaNova/biz/AyaEvent.cs
@@ -21,7 +21,8 @@ namespace AyaNova.Biz
         LicenseFetch=7,
         LicenseTrialRequest=8,
         ServerStateChange=9,
-        SeedDatabase=10
+        SeedDatabase=10,
+        TagMassUntag=11
 
         //NEW ITEMS REQUIRE LOCALE KEYS AND UPDATE EventLogProcessor code that prefetches required keys
 
diff --git a/server/AyaNova/biz/TagBiz.cs b/server/AyaNova/biz/TagBiz.cs
index b1286dd4..471990be 100644
--- a/server/AyaNova/biz/TagBiz.cs
+++ b/server/AyaNova/biz/TagBiz.cs
@@ -200,6 +200,19 @@ namespace AyaNova.Biz
         }
 
 
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////
+        // UNTAG - Untag this tag from everywhere it's used
+        //
+        internal bool Untag(Tag dbObj)
+        {
+            //Be careful in future, if you put ToString at the end of each object in the string interpolation
+            //npgsql driver will assume it's a string and put quotes around it triggering an error that a string can't be compared to an int
+            ct.Database.ExecuteSqlCommand($"delete from atagmap where tagid = {dbObj.Id}");
+            ct.Database.ExecuteSqlCommand($"delete from ataggroupmap where tagid = {dbObj.Id}");
+            return true;
+        }
+
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //VALIDATION
         //
diff --git a/server/AyaNova/biz/TagGroupBiz.cs b/server/AyaNova/biz/TagGroupBiz.cs
index 9e5f7f33..c9dc19a1 100644
--- a/server/AyaNova/biz/TagGroupBiz.cs
+++ b/server/AyaNova/biz/TagGroupBiz.cs
@@ -32,7 +32,7 @@ namespace AyaNova.Biz
         }
 
 
-        
+
 
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //CREATE        
@@ -195,7 +195,8 @@ namespace AyaNova.Biz
             ValidateCanDelete(dbObj);
             if (HasErrors)
                 return false;
-            ct.TagGroup.Remove(dbObj);
+            ct.Database.ExecuteSqlCommand($"delete from ataggroupmap where taggroupid = {dbObj.Id}");
+            ct.Database.ExecuteSqlCommand($"delete from ataggroup where id = {dbObj.Id}");
             return true;
         }
 
@@ -231,10 +232,10 @@ namespace AyaNova.Biz
             //whatever needs to be check to delete this object
 
             //See if any TagGroupmaps exist with this TagGroup in which case it's not deleteable
-            if (ct.TagGroupMap.Any(e => e.TagGroupId == inObj.Id))
-            {
-                AddError(ValidationErrorType.ReferentialIntegrity, "object", "Can't be deleted while has relations");
-            }
+            // if (ct.TagGroupMap.Any(e => e.TagGroupId == inObj.Id))
+            // {
+            //     AddError(ValidationErrorType.ReferentialIntegrity, "TagGroup", "Can't be deleted while has tags mapped");
+            // }
 
         }