Hello, How can we report a bug about this? Seems like I cannot create an account at https://bugs.opera.com

This change to opera-stable.postinst would solve the problem:

--- /tmp/opera-stable.postinst.current	2026-09-24 23:36:55.706764023 +0200
+++ /tmp/opera-stable.postinst.proposed	2026-09-24 23:44:53.964246904 +0200
@@ -3,6 +3,7 @@
 
 . /usr/share/debconf/confmodule
 
+APT_SOURCES_FILE="/etc/apt/sources.list.d/opera-stable.sources"
 APT_FILE="/etc/apt/sources.list.d/opera-stable.list"
 OPERA_REPO="deb.opera.com\/opera-stable\/"
 
@@ -17,7 +18,7 @@
         chmod 4755 /usr/lib/x86_64-linux-gnu/opera-stable/opera_sandbox
         db_get opera-stable/add-deb-source
         if [ "$RET" = true ]; then
-            if [ ! -f $APT_FILE ]; then
+            if [ ! -f $APT_FILE ] && [ ! -f $APT_SOURCES_FILE ]; then
                 cat > $APT_FILE <<EOF
 # This file makes sure that Opera Browser is kept up-to-date
 # as part of regular system upgrades