diff --git a/.github/workflows/prebuilt.yml b/.github/workflows/prebuilt.yml
index 81f4baf..35e6062 100644
--- a/.github/workflows/prebuilt.yml
+++ b/.github/workflows/prebuilt.yml
@@ -39,9 +39,6 @@ jobs:
           - boot: boot-qemu_aarch64_virt
             debian: ubuntu-jammy-arm64
             debian_index: /index-debians-arm64.txt
-          - boot: boot-qemu_aarch64_virt
-            debian: ubuntu-mantic-arm64
-            debian_index: /index-debians-arm64.txt
           - boot: boot-qemu_aarch64_virt
             debian: ubuntu-noble-arm64
             debian_index: /index-debians-arm64.txt