diff --git a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
index e051cc447..56d240079 100644
--- a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
@@ -1216,6 +1216,27 @@ RSpec.describe BulkUpload::Lettings::Year2024::RowParser do
       end
     end
 
+    describe "#field_100" do
+      context "when log is a renewal and field 100 is an invalid value" do
+        let(:attributes) { { bulk_upload:, field_7: 1, field_100: 5 } }
+
+        it "adds an error to field 100" do
+          parser.valid?
+          expect(parser.errors[:field_100]).to be_present
+          expect(parser.errors[:field_100]).to include(I18n.t("validations.lettings.2024.bulk_upload.prevten.invalid"))
+        end
+      end
+
+      context "when log is a renewal and field 100 is a valid value" do
+        let(:attributes) { { bulk_upload:, field_7: 1, field_100: 32 } }
+
+        it "is does not add an error" do
+          parser.valid?
+          expect(parser.errors[:field_100]).to be_blank
+        end
+      end
+    end
+
     describe "#field_112 - 115 (lettings allocation methods)" do
       %i[field_112 field_113 field_114 field_115].each do |field|
         context "when only #{field} is not given" do
diff --git a/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
index 2692c05ac..eb1716fe5 100644
--- a/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2025/row_parser_spec.rb
@@ -1053,6 +1053,27 @@ RSpec.describe BulkUpload::Lettings::Year2025::RowParser do
       end
     end
 
+    describe "#field_100" do
+      context "when log is a renewal and field 100 is an invalid value" do
+        let(:attributes) { { bulk_upload:, field_7: 1, field_100: 4 } }
+
+        it "adds an error to field 100" do
+          parser.valid?
+          expect(parser.errors[:field_100]).to be_present
+          expect(parser.errors[:field_100]).to include(I18n.t("validations.lettings.2025.bulk_upload.prevten.invalid"))
+        end
+      end
+
+      context "when log is a renewal and field 100 is a valid value" do
+        let(:attributes) { { bulk_upload:, field_7: 1, field_100: 38 } }
+
+        it "is does not add an error" do
+          parser.valid?
+          expect(parser.errors[:field_100]).to be_blank
+        end
+      end
+    end
+
     describe "#field_112 - 115 (lettings allocation methods)" do
       %i[field_112 field_113 field_114 field_115].each do |field|
         context "when only #{field} is not given" do