diff --git a/rubygem-rmagick.spec b/rubygem-rmagick.spec
index 5d0da22..987ede0 100644
--- a/rubygem-rmagick.spec
+++ b/rubygem-rmagick.spec
@@ -8,8 +8,8 @@ Requires:		(ImageMagick%{?_isa} >= %2 with ImageMagick%{?_isa} < %3)\
 %{nil}
 
 Name:		rubygem-%{gem_name}
-Version:	6.1.5
-Release:	2%{?dist}
+Version:	6.1.2
+Release:	1%{?dist}
 
 Summary:	Ruby binding to ImageMagick
 # SPDX confirmed
@@ -34,7 +34,6 @@ BuildRequires:	rubygem(pry)
 # With rmagick <= 5.5.0, ImageMagick X.Y.Z should all match,
 # with rmagick >= 6.0.0, ImageMagick X.Y should match.
 %if 0%{?fedora}
-%setIMver 45 1:7.1 1:7.2
 %setIMver 44 1:7.1 1:7.2
 %setIMver 43 1:7.1 1:7.2
 %setIMver 42 1:7.1 1:7.2
@@ -145,24 +144,6 @@ done
 %doc	%{gem_instdir}/examples/
 
 %changelog
-* Thu Jan 08 2026 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.5-2
-- Rebuild for https://fedoraproject.org/wiki/Changes/Ruby_4.0
-
-* Sun Dec 28 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.5-1
-- 6.1.5
-
-* Wed Oct 29 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.4-2
-- Apply upstream patch for ruby3_5 Ractor change for testsuite
-
-* Sun Aug 24 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.4-1
-- 6.1.4
-
-* Sun Aug 17 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.3-1
-- 6.1.3
-
-* Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 6.1.2-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
-
 * Sun Jul 20 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 6.1.2-1
 - 6.1.2
 
diff --git a/sources b/sources
index 6a164e1..f8d9c03 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (rmagick-6.1.5.gem) = 15157dda3185e8677c08d9b33564d1c85e3c3573ad9f6ab2358c32ec8a790eb2aa765cde095f98eb500cd818e3b71535dd289524eb35c9c5e721be3af4b1ba18
-SHA512 (rubygem-rmagick-6.1.5-full.tar.gz) = ce65bacd8e775fc4751784d427ab52a5b936ca5a465751d63380d42e0928911389f3388474c936eeb59d93d242c9923240168911705c1243b8e5d195d258fd8a
+SHA512 (rmagick-6.1.2.gem) = afae91302878630f2ed3c4abb0ae77658a646a054e7ac579795ee6094d0e30b98951731ee976ffc25bfddacbfb4c3b485a88cc3718e8962e1edaed75ceff0e4a
+SHA512 (rubygem-rmagick-6.1.2-full.tar.gz) = 7f4de3e12a227b7716b42695b1dfe8e6c690359af1280d9deb3476d82639b6c5b1181998f878bd4f90375440fb219b15ef3517cd1f7de13bddbdc8d641835a0c