diff --git a/Dfe.Academies.Academisation.Service/Mappers/Legacy/ProjectAggregate/LegacyProjectDetailsMapper.cs b/Dfe.Academies.Academisation.Service/Mappers/Legacy/ProjectAggregate/LegacyProjectDetailsMapper.cs
index 82257d8cf..0c9a7c0ea 100644
--- a/Dfe.Academies.Academisation.Service/Mappers/Legacy/ProjectAggregate/LegacyProjectDetailsMapper.cs
+++ b/Dfe.Academies.Academisation.Service/Mappers/Legacy/ProjectAggregate/LegacyProjectDetailsMapper.cs
@@ -29,8 +29,8 @@ internal static ProjectDetails MapNonEmptyFields(this LegacyProjectServiceModel
 			BaselineDate = detailsToUpdate.BaselineDate ?? existingProject.Details.BaselineDate,
 
 			// la summary page
-			LocalAuthorityInformationTemplateSentDate = detailsToUpdate.LocalAuthorityInformationTemplateSentDate ?? existingProject.Details.LocalAuthorityInformationTemplateSentDate,
-			LocalAuthorityInformationTemplateReturnedDate = detailsToUpdate.LocalAuthorityInformationTemplateReturnedDate ?? existingProject.Details.LocalAuthorityInformationTemplateReturnedDate,
+			LocalAuthorityInformationTemplateSentDate = detailsToUpdate.LocalAuthorityInformationTemplateSentDate.Equals(default(DateTime)) ? null : detailsToUpdate.LocalAuthorityInformationTemplateSentDate ?? existingProject.Details.LocalAuthorityInformationTemplateSentDate,
+			LocalAuthorityInformationTemplateReturnedDate = detailsToUpdate.LocalAuthorityInformationTemplateReturnedDate.Equals(default(DateTime)) ? null : detailsToUpdate.LocalAuthorityInformationTemplateReturnedDate ?? existingProject.Details.LocalAuthorityInformationTemplateReturnedDate,
 			LocalAuthorityInformationTemplateComments = detailsToUpdate.LocalAuthorityInformationTemplateComments ?? existingProject.Details.LocalAuthorityInformationTemplateComments,
 			LocalAuthorityInformationTemplateLink = detailsToUpdate.LocalAuthorityInformationTemplateLink ?? existingProject.Details.LocalAuthorityInformationTemplateLink,
 			LocalAuthorityInformationTemplateSectionComplete = detailsToUpdate.LocalAuthorityInformationTemplateSectionComplete ?? existingProject.Details.LocalAuthorityInformationTemplateSectionComplete,