diff --git a/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs b/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
index 8149416..4b66322 100644
--- a/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
+++ b/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
@@ -18,7 +18,9 @@ public class HeaderQueryBehavior<TRecAction>(IRecDbContext dbContext, ILogger<He
         var result = await dbContext.HeaderQueryResults.FromSqlRaw(action.HeaderQuery).FirstOrDefaultAsync(cancel);
 
         if(result?.RawHeader is null)
-            return await next(cancel);
+            throw new InvalidOperationException(
+                $"Header query did not return a result or returned a null REQUEST_HEADER. " +
+                $"ProfileId: {action.ProfileId}, ActionId: {action.ActionId}.");
 
         var headerDict = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(result.RawHeader);