diff --git a/0001-lib-Autodetect-backing-format-for-qemu-img-create-b.patch b/0001-lib-Autodetect-backing-format-for-qemu-img-create-b.patch
deleted file mode 100644
index 9a2250f..0000000
--- a/0001-lib-Autodetect-backing-format-for-qemu-img-create-b.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-From 45de287447bb18d59749fbfc1ec5072413090109 Mon Sep 17 00:00:00 2001
-From: "Richard W.M. Jones" <rjones@redhat.com>
-Date: Tue, 31 Aug 2021 08:27:15 +0100
-Subject: [PATCH] lib: Autodetect backing format for qemu-img create -b
-
-qemu 6.1 has decided to change qemu-img create so that a backing
-format (-F) is required if a backing file (-b) is specified.  Since we
-don't want to change the libguestfs API to force callers to specify
-this because that would be an API break, autodetect it.
-
-This is similar to commit c8c181e8d9 ("launch: libvirt: Autodetect
-backing format for readonly drive overlays").
-
-Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1998820
----
- lib/create.c | 9 +++++++++
- 1 file changed, 9 insertions(+)
-
-diff --git a/lib/create.c b/lib/create.c
-index 44a7df25f..75a4d3a28 100644
---- a/lib/create.c
-+++ b/lib/create.c
-@@ -255,6 +255,7 @@ disk_create_qcow2 (guestfs_h *g, const char *filename, int64_t size,
-                    const struct guestfs_disk_create_argv *optargs)
- {
-   const char *backingformat = NULL;
-+  CLEANUP_FREE char *backingformat_free = NULL;
-   const char *preallocation = NULL;
-   const char *compat = NULL;
-   int clustersize = -1;
-@@ -270,6 +271,14 @@ disk_create_qcow2 (guestfs_h *g, const char *filename, int64_t size,
-       return -1;
-     }
-   }
-+  else if (backingfile) {
-+    /* Since qemu 6.1, qemu-img create has requires a backing format (-F)
-+     * parameter if backing file (-b) is used (RHBZ#1998820).
-+     */
-+    backingformat = backingformat_free = guestfs_disk_format (g, backingfile);
-+    if (!backingformat)
-+      return -1;
-+  }
-   if (optargs->bitmask & GUESTFS_DISK_CREATE_PREALLOCATION_BITMASK) {
-     if (STREQ (optargs->preallocation, "off") ||
-         STREQ (optargs->preallocation, "sparse"))
--- 
-2.32.0
-
diff --git a/libguestfs.spec b/libguestfs.spec
index 0151c70..eb3414e 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -56,8 +56,8 @@
 Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
-Version:       1.45.6
-Release:       12%{?dist}
+Version:       1.45.7
+Release:       1%{?dist}
 License:       LGPLv2+
 
 # Build only for architectures that have a kernel
@@ -1143,8 +1143,9 @@ rm ocaml/html/.gitignore
 
 
 %changelog
-* Tue Aug 31 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.45.6-12
-- Upstream patch to work with qemu 6.1 (RHBZ#1998820)
+* Tue Aug 31 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.45.7-1
+- New upstream development version 1.45.7.
+- Fix to work with qemu 6.1 (RHBZ#1998820)
 
 * Fri Aug 06 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.45.6-11
 - Fix license files.
diff --git a/sources b/sources
index 33a2bac..b1659fa 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (libguestfs-1.45.6.tar.gz) = 018aec83d153aeabb7c0b255e6d5b40b03ff6d0de12dc1e0557fc35215db593aaa871c4bc1f44e785f74bf02a367aec0e90157f8ff159cccc820ebf1afd2258a
-SHA512 (libguestfs-1.45.6.tar.gz.sig) = 8f0be35a265356e7bd823b3d9302449ac62d633de8a9bd40ca457bcb4e4d2aebc827c4867bfdb6f3e3a4f34ade168103f5af0a44b667c875be7721e275433dbe
+SHA512 (libguestfs-1.45.7.tar.gz) = 16cdfb59077f753908b46a5a7ffcbb5b878cd224fa4a5b87878ebae2c0c3981f0b68f2df2c35c9f44676886922eb9afbcdacb5d6ee2d34b28e053440face7132
+SHA512 (libguestfs-1.45.7.tar.gz.sig) = 1a999eba5275821e7013deea3803aa2ad2ebcd082b8f9a978ffce45e23d3f42af4c5e78700914d79804b42530c1cfd629d98b4977fe35bd11ed3f97dad705ea9