diff -Nru boxer-data-10.8.28/buster/classes/Desktop/email/thunderbird/locale/ASIA.yml boxer-data-10.8.28+rpi2/buster/classes/Desktop/email/thunderbird/locale/ASIA.yml
--- boxer-data-10.8.28/buster/classes/Desktop/email/thunderbird/locale/ASIA.yml	2018-11-12 12:18:21.000000000 +0000
+++ boxer-data-10.8.28+rpi2/buster/classes/Desktop/email/thunderbird/locale/ASIA.yml	2022-02-01 21:16:23.000000000 +0000
@@ -19,7 +19,6 @@
     - thunderbird-l10n-ko
     - thunderbird-l10n-ms
     - thunderbird-l10n-ru
-    - thunderbird-l10n-si
     - thunderbird-l10n-tr
     - thunderbird-l10n-vi
     - thunderbird-l10n-zh-cn
diff -Nru boxer-data-10.8.28/buster/classes/Desktop/scheduling/lightning/init.yml boxer-data-10.8.28+rpi2/buster/classes/Desktop/scheduling/lightning/init.yml
--- boxer-data-10.8.28/buster/classes/Desktop/scheduling/lightning/init.yml	2019-12-04 11:05:23.000000000 +0000
+++ boxer-data-10.8.28+rpi2/buster/classes/Desktop/scheduling/lightning/init.yml	2022-02-01 20:41:10.000000000 +0000
@@ -7,5 +7,5 @@
       pkg:
         - include Thunderbird extension Lightning
   pkg:
-    - lightning
+    - thunderbird
     - webext-dav4tbsync
diff -Nru boxer-data-10.8.28/debian/changelog boxer-data-10.8.28+rpi2/debian/changelog
--- boxer-data-10.8.28/debian/changelog	2021-04-23 08:04:43.000000000 +0000
+++ boxer-data-10.8.28+rpi2/debian/changelog	2022-02-01 21:16:34.000000000 +0000
@@ -1,3 +1,17 @@
+boxer-data (10.8.28+rpi2) bullseye-staging; urgency=medium
+
+  * Remove reference to thunderbird-l10-si which is no longer
+    built by current thunderbird.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 01 Feb 2022 21:16:34 +0000
+
+boxer-data (10.8.28+rpi1) bullseye-staging; urgency=medium
+
+  * Reference thunderbird rather than lightning, the lightning
+    transitional package has been dropped by the latest thunderbird.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 01 Feb 2022 20:41:20 +0000
+
 boxer-data (10.8.28) unstable; urgency=medium
 
   * fix exclude node showmebox-gnustep in autopkgtests