Signing multisig without add-signaure params also updates the info.json

[RetricSu]

I am using ckb-cli 2.0.0 version. During the upgrades of nostr-binding scripts on mainnet, I noticed that there is confusing part of ckb-cli, where I sign multisig with ckb-cli without adding the option --add-signature but the info.json still got updated, which is very confused to me. is that a bug or expected behavior?

Signing the multisig:

ckb-cli --url https://mainnet.ckb.dev deploy sign-txs \
    --from-account ckb1qyqysn2jjy7xr59qwajnqqytvdtmj0jdp0cs6qr8r6 \
    --info-file info.json 
Password: 
cell_tx_signatures:
  0xd4ade5100cf112c9cd3e8da12ae5fc6153293087: 0xc1021d3b422d7e5a4969c7638948015c2255e44ff38482cfe5b7e729d4bb377132d91f587922bc4f9d42f4f72d8ca70d006b917a5e6942fc758c7c687b5c188501

info.json file still got modified:

 ✘  ~/Desktop/nostr-binding/deployment/mainnet/nostr-binding-type-script   main ±  git diff info.json | head -n 20
diff --git a/deployment/mainnet/nostr-binding-type-script/info.json b/deployment/mainnet/nostr-binding-type-script/info.json
index a01e487..91f2f00 100644
--- a/deployment/mainnet/nostr-binding-type-script/info.json
+++ b/deployment/mainnet/nostr-binding-type-script/info.json
@@ -54,7 +54,7 @@
     "dep_group_recipes": []
   },
   "used_input_txs": {
-    "0x0135d9b7f3232bc6fa1ce4e64101235f2d98972b42a9ff90e54cbe58d996eb2b": {
+    "0x86d21ad7d41c5b16e18f6e74a1a603ec398ca03b9d604d46e406f9acca88e7bd": {
       "version": "0x0",
       "cell_deps": [
         {
@@ -63,6 +63,13 @@
             "index": "0x0"
           },
           "dep_type": "dep_group"
+        },
+        {
+          "out_point": {