diff --git a/app/ldap_protocol/ldap_requests/add.py b/app/ldap_protocol/ldap_requests/add.py
index d6939d4b4..75be3f6fc 100644
--- a/app/ldap_protocol/ldap_requests/add.py
+++ b/app/ldap_protocol/ldap_requests/add.py
@@ -19,6 +19,7 @@
     KRBAPIAddPrincipalError,
     KRBAPIConnectionError,
     KRBAPIDeletePrincipalError,
+    KRBAPIPrincipalNotFoundError,
 )
 from ldap_protocol.ldap_codes import LDAPCodes
 from ldap_protocol.ldap_responses import INVALID_ACCESS_RESPONSE, AddResponse
@@ -456,7 +457,10 @@ async def handle(  # noqa: C901
                 # stub cannot raise error
                 if user:
                     # NOTE: Try to delete existing principal if any
-                    with contextlib.suppress(KRBAPIDeletePrincipalError):
+                    with contextlib.suppress(
+                        KRBAPIDeletePrincipalError,
+                        KRBAPIPrincipalNotFoundError,
+                    ):
                         await ctx.kadmin.del_principal(
                             user.get_upn_prefix(),
                         )
diff --git a/interface b/interface
index 95ed5e191..f31962020 160000
--- a/interface
+++ b/interface
@@ -1 +1 @@
-Subproject commit 95ed5e191cdafa07b1dfac96a1659926679ead97
+Subproject commit f31962020a6689e6a4c61fb3349db5b5c7895f92