diff --git a/backport-Udppktinfo-fix-bug-in-a-macro.patch b/backport-Udppktinfo-fix-bug-in-a-macro.patch
deleted file mode 100644
index faa9ac96fc356cd431b2f14a9775ee6298bc759b..0000000000000000000000000000000000000000
--- a/backport-Udppktinfo-fix-bug-in-a-macro.patch
+++ /dev/null
@@ -1,60 +0,0 @@
-From 67abc25fa9deadd3638bb1b78373d2f08de0d54d Mon Sep 17 00:00:00 2001
-From: Sergey Fedorov <vital.had@gmail.com>
-Date: Fri, 10 Oct 2025 13:54:40 +0800
-Subject: [PATCH] Fix fallback macros in udppktinfo.c
-
-Commit 87b7d86676bff0b64a9eea39849abc97fdbe2972 changed the signatures
-of several udppktinfo.c functions, but did not update the fallback
-macro signatures to match.  Update the fallback macros.  Fixes a build
-error observed on macOS 10.6.8.
-
-[ghudson@mit.edu: fixed additional fallback macros; edited commit
-message]
-
----
- src/lib/apputils/udppktinfo.c | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/lib/apputils/udppktinfo.c b/src/lib/apputils/udppktinfo.c
-index c6e86f6..f858daf 100644
---- a/src/lib/apputils/udppktinfo.c
-+++ b/src/lib/apputils/udppktinfo.c
-@@ -215,7 +215,7 @@ check_cmsg_ip_recvdstaddr(struct cmsghdr *cmsgptr, struct sockaddr *to,
- }
- 
- #else /* HAVE_IP_PKTINFO || IP_RECVDSTADDR */
--#define check_cmsg_v4_pktinfo(c, t, l, a) 0
-+#define check_cmsg_v4_pktinfo(c, t, a) 0
- #endif /* HAVE_IP_PKTINFO || IP_RECVDSTADDR */
- 
- #ifdef HAVE_IPV6_PKTINFO
-@@ -248,7 +248,7 @@ check_cmsg_ipv6_pktinfo(struct cmsghdr *cmsgptr, struct sockaddr *to,
-     return 0;
- }
- #else /* HAVE_IPV6_PKTINFO */
--#define check_cmsg_v6_pktinfo(c, t, l, a) 0
-+#define check_cmsg_v6_pktinfo(c, t, a) 0
- #endif /* HAVE_IPV6_PKTINFO */
- 
- static int
-@@ -379,7 +379,7 @@ set_msg_from_ip_sendsrcaddr(struct msghdr *msg, struct cmsghdr *cmsgptr,
- }
- 
- #else /* HAVE_IP_PKTINFO || IP_SENDSRCADDR */
--#define set_msg_from_ipv4(m, c, f, l, a) EINVAL
-+#define set_msg_from_ipv4(m, c, f, a) EINVAL
- #endif /* HAVE_IP_PKTINFO || IP_SENDSRCADDR */
- 
- #ifdef HAVE_IPV6_PKTINFO
-@@ -417,7 +417,7 @@ set_msg_from_ipv6_pktinfo(struct msghdr *msg, struct cmsghdr *cmsgptr,
- }
- 
- #else /* HAVE_IPV6_PKTINFO */
--#define set_msg_from_ipv6(m, c, f, l, a) EINVAL
-+#define set_msg_from_ipv6(m, c, f, a) EINVAL
- #endif /* HAVE_IPV6_PKTINFO */
- 
- static krb5_error_code
--- 
-2.43.0
-
diff --git a/krb5.spec b/krb5.spec
index c413994d4e2438e919a87439482ffef95baf0835..e72c97fcca0de8fbdb7c654182445fd151ee5d3f 100644
--- a/krb5.spec
+++ b/krb5.spec
@@ -3,7 +3,7 @@
 
 Name:     krb5
 Version:  1.21.2
-Release:  17
+Release:  18
 Summary:  The Kerberos network authentication protocol
 License:  MIT
 URL:      http://web.mit.edu/kerberos/www/
@@ -60,7 +60,6 @@ Patch36: backport-Fix-correctness-in-LDAP-delegation-ACL-checking.patch
 Patch37: backport-Fix-kdb5_util-ark-with-no-e-option.patch
 Patch38: backport-Fix-typo-in-AS-REQ-client-code.patch
 Patch39: backport-Fix-error-handling-in-pkinit_server_verify_padata.patch
-Patch40: backport-Udppktinfo-fix-bug-in-a-macro.patch
 
 BuildRequires:  gettext
 BuildRequires:  gcc make automake autoconf pkgconfig pam-devel libselinux-devel byacc
@@ -345,6 +344,9 @@ make -C src check || :
 %{_mandir}/man8/*
 
 %changelog
+* Tue Nov 18 2025 zhangyaqi <zhangyaqi@kylinos.cn> - 1.21.2-18
+- Delete the last submitted patch
+
 * Fri Oct 31 2025 zhangyaqi <zhangyaqi@kylinos.cn> - 1.21.2-17
 - backport upstream patches