diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2c6a688b..6f824102 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -62,7 +62,7 @@ default:
     - if [ "${release}" = "buster" ]; then base_yaml="${base_yaml}:kas/opt/buster.yml"; fi
     - if [ "${release}" = "bullseye" ]; then base_yaml="${base_yaml}:kas/opt/bullseye.yml"; fi
     - if [ "${release}" = "bookworm" ]; then base_yaml="${base_yaml}:kas/opt/bookworm.yml"; fi
-    - if [ "${release}" = "sid" ]; then base_yaml="${base_yaml}:kas/opt/sid.yml"; fi
+    - if [ "${release}" = "trixie" ]; then base_yaml="${base_yaml}:kas/opt/trixie.yml"; fi
     - if [ "${encrypt}" = "enable" ]; then base_yaml="${base_yaml}:kas/opt/encrypt-data.yml"; fi
     - if [ "${swupdate_version}" = "2022.12" ]; then base_yaml="${base_yaml}:kas/opt/swupdate-2022.12.yaml"; fi
     - echo "Building ${base_yaml}"
@@ -333,13 +333,13 @@ build:qemu-amd64-secure-boot-buster:
     deploy: disable
     encrypt: enable
 
-# riscv64 (sid)
+# trixie images
 build:qemu-riscv64:
   extends:
     - .build_base
   variables:
     target: qemu-riscv64
-    release: sid
+    release: trixie
     use_rt: disable
     targz: disable
     deploy: disable
diff --git a/Kconfig b/Kconfig
index 09bb7699..3c246fa5 100644
--- a/Kconfig
+++ b/Kconfig
@@ -139,10 +139,6 @@ config DEBIAN_BOOKWORM
 config DEBIAN_TRIXIE
 	bool "trixie (testing)"
 
-config DEBIAN_SID
-	bool "sid (unstable)"
-	depends on ARCH_RISCV64
-
 endchoice
 
 config KAS_INCLUDE_DEBIAN
@@ -151,7 +147,6 @@ config KAS_INCLUDE_DEBIAN
 	default "kas/opt/bullseye.yml" if DEBIAN_BULLSEYE
 	default "kas/opt/bookworm.yml" if DEBIAN_BOOKWORM
 	default "kas/opt/trixie.yml" if DEBIAN_TRIXIE
-	default "kas/opt/sid.yml" if DEBIAN_SID
 
 comment "Image features"
 
diff --git a/classes/delta-update.bbclass b/classes/delta-update.bbclass
index ae2453d7..ab11be59 100644
--- a/classes/delta-update.bbclass
+++ b/classes/delta-update.bbclass
@@ -27,8 +27,8 @@ python () {
         if d.getVar("DELTA_RDIFF_REF_IMAGE") == "":
             bb.fatal("You must set DELTA_RDIFF_REF_IMAGE and provide the required files as artifacts to this recipe")
     elif d.getVar("DELTA_UPDATE_TYPE") == "zchunk":
-        if d.getVar("BASE_DISTRO_CODENAME") != "sid":
-            bb.fatal("Zchunk based delta update is only supported from sid")
+        if d.getVar("BASE_DISTRO_CODENAME") != "trixie":
+            bb.fatal("Zchunk based delta update is only supported from trixie onward")
     else:
         disable_delta_update_tasks(d)
 }
diff --git a/conf/distro/cip-core-sid.conf b/conf/distro/cip-core-sid.conf
deleted file mode 100644
index eefcbb59..00000000
--- a/conf/distro/cip-core-sid.conf
+++ /dev/null
@@ -1,20 +0,0 @@
-#
-# CIP Core, generic profile
-#
-# Copyright (c) Siemens AG, 2022-2024
-#
-# Authors:
-#  Jan Kiszka <jan.kiszka@siemens.com>
-#
-# SPDX-License-Identifier: MIT
-#
-
-require conf/distro/debian-sid.conf
-require cip-core-common.inc
-
-# corresponds to 20240211T000000Z
-ISAR_APT_SNAPSHOT_TIMESTAMP ?= "1707606000"
-ISAR_USE_APT_SNAPSHOT ?= "1"
-
-PREFERRED_VERSION_linux-cip ?= "6.1.%"
-PREFERRED_VERSION_linux-cip-rt ?= "6.1.%"
diff --git a/doc/README.swupdate.md b/doc/README.swupdate.md
index 027a8fd7..5308a50f 100644
--- a/doc/README.swupdate.md
+++ b/doc/README.swupdate.md
@@ -435,27 +435,27 @@ host$ scp -P 22222 ./cip-core-image-cip-core-bookworm-qemu-amd64.swu root@localh
 
 ## Delta Software Update using zchunk handler
 
-Currently zchunk based delta updates are supported only in Sid images. Make sure to build the first image with Sid as the distribution with the following command:
+Currently zchunk based delta updates are supported only in trixie images. Make sure to build the first image with trixie as the distribution with the following command:
 ```
-host$ ./kas-container build kas-cip.yml:kas/board/qemu-amd64.yml:kas/opt/ebg-swu.yml:kas/opt/sid.yml
+host$ ./kas-container build kas-cip.yml:kas/board/qemu-amd64.yml:kas/opt/ebg-swu.yml:kas/opt/trixie.yml
 ```
 For Delta update with zchunk, set the variable `DELTA_ZCK_URL` with the URL of the zck file that is hosted in a http server and set the `DELTA_UPDATE_TYPE` to `zchunk` in `delta-update.yml` file.
 
 Build the second image with the modification as shown above with the following command:
 ```
-KAS_BUILD_DIR=build-v2 ./kas-container build kas-cip.yml:kas/board/qemu-amd64.yml:kas/opt/ebg-swu.yml:kas/opt/sid.yml:kas/opt/delta-update.yml
+KAS_BUILD_DIR=build-v2 ./kas-container build kas-cip.yml:kas/board/qemu-amd64.yml:kas/opt/ebg-swu.yml:kas/opt/trixie.yml:kas/opt/delta-update.yml
 ```
 Now start the first image. Run the following commands:
 ```
-host$ DISTRO_RELEASE=sid SWUPDATE_BOOT=y ./start-qemu.sh amd64
+host$ DISTRO_RELEASE=trixie SWUPDATE_BOOT=y ./start-qemu.sh amd64
 ```
-Copy `cip-core-image-cip-core-sid-qemu-amd64.swu` file from `build-v2/tmp/deploy/images/qemu-amd64/` folder into the running system:
+Copy `cip-core-image-cip-core-trixie-qemu-amd64.swu` file from `build-v2/tmp/deploy/images/qemu-amd64/` folder into the running system:
 ```
 host$ cd build-v2/tmp/deploy/images/qemu-amd64/
-host$ scp -P 22222 ./cip-core-image-cip-core-sid-qemu-amd64.swu root@localhost:
+host$ scp -P 22222 ./cip-core-image-cip-core-trixie-qemu-amd64.swu root@localhost:
 ```
-The `cip-core-image-cip-core-sid-qemu-amd64.zck` file must be hosted in a http server.
-Any http server (service) can be used to host the .zck file as long as the http server supports http range requests. Copy the `build-v2/tmp/deploy/images/qemu-amd64/cip-core-image-cip-core-sid-qemu-amd64.zck` to the server directory. For more information on the integration of zchunk handler in swupdate, refer the [documentation](https://sbabic.github.io/swupdate/delta-update.html#integration-in-swupdate-the-delta-handler)
+The `cip-core-image-cip-core-trixie-qemu-amd64.zck` file must be hosted in a http server.
+Any http server (service) can be used to host the .zck file as long as the http server supports http range requests. Copy the `build-v2/tmp/deploy/images/qemu-amd64/cip-core-image-cip-core-trixie-qemu-amd64.zck` to the server directory. For more information on the integration of zchunk handler in swupdate, refer the [documentation](https://sbabic.github.io/swupdate/delta-update.html#integration-in-swupdate-the-delta-handler)
 
 ## Delta Software Update Verification
 
diff --git a/kas/opt/sid.yml b/kas/opt/sid.yml
deleted file mode 100644
index be2eeb47..00000000
--- a/kas/opt/sid.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-#
-# CIP Core, generic profile
-#
-# Copyright (c) Siemens AG, 2022-2024
-#
-# Authors:
-#  Jan Kiszka <jan.kiszka@siemens.com>
-#
-# SPDX-License-Identifier: MIT
-#
-
-header:
-  version: 14
-
-distro: cip-core-sid
diff --git a/recipes-bsp/efibootguard/efibootguard_0.18-1+cip.bb b/recipes-bsp/efibootguard/efibootguard_0.18-1+cip.bb
index 5f1a47e8..6d32833a 100644
--- a/recipes-bsp/efibootguard/efibootguard_0.18-1+cip.bb
+++ b/recipes-bsp/efibootguard/efibootguard_0.18-1+cip.bb
@@ -39,7 +39,6 @@ DEPENDS:bullseye = "python-shtab"
 DEPENDS:bookworm = "python-shtab"
 
 DEPENDS:trixie = "gnu-efi"
-DEPENDS:sid    = "gnu-efi"
 
 # needed for buster, bullseye could use compat >= 13
 python() {
diff --git a/start-qemu.sh b/start-qemu.sh
index 0e425ea7..e8f1cfc3 100755
--- a/start-qemu.sh
+++ b/start-qemu.sh
@@ -40,9 +40,7 @@ if [ -n "${QEMU_PATH}" ]; then
 fi
 
 if [ -z "${DISTRO_RELEASE}" ]; then
-	if grep -s -q "DEBIAN_SID: true" .config.yaml; then
-		DISTRO_RELEASE="sid"
-	elif grep -s -q "DEBIAN_BUSTER: true" .config.yaml; then
+	if grep -s -q "DEBIAN_BUSTER: true" .config.yaml; then
 		DISTRO_RELEASE="buster"
 	elif grep -s -q "DEBIAN_BOOKWORM: true" .config.yaml; then
 		DISTRO_RELEASE="bookworm"
