diff --git a/dnsapi/dns_czechia.sh b/dnsapi/dns_czechia.sh
index bd8069df..6b2af086 100644
--- a/dnsapi/dns_czechia.sh
+++ b/dnsapi/dns_czechia.sh
@@ -23,28 +23,42 @@ dns_czechia_add() {
   _cz=$(printf "%s" "$_current_zone" | _lower_case | sed 's/ //g')
   _tk=$(printf "%s" "$CZ_AuthorizationToken" | sed 's/ //g')
   if [ -z "$_cz" ] || [ -z "$_tk" ]; then
-    _err "Missing zone or AuthorizationToken (CZ_Zones/CZ_AuthorizationToken)."
+    _err "Missing zone or Token."
     return 1
   fi
   _url="$CZ_API_BASE/api/DNS/$_cz/TXT"
   _fd=$(printf "%s" "$fulldomain" | _lower_case | sed 's/\.$//')
+
+  # Robustní určení hostname - pokud se shoduje se zónou, použije @
   if [ "$_fd" = "$_cz" ]; then
     _h="@"
   else
     _h=$(printf "%s" "$_fd" | sed "s/\.$_cz$//")
+    [ "$_h" = "$_fd" ] && _h="@"
   fi
+  # Pojistka: hostName nesmí být nikdy prázdný řetězec
+  [ -z "$_h" ] && _h="@"
+
   _info "Adding TXT record for $_h in zone $_cz"
   _h_esc=$(printf "%s" "$_h" | sed 's/\\/\\\\/g; s/"/\\"/g')
   _txt_esc=$(printf "%s" "$txtvalue" | sed 's/\\/\\\\/g; s/"/\\"/g')
   _body="{\"hostName\":\"$_h_esc\",\"text\":\"$_txt_esc\",\"ttl\":60,\"publishZone\":1}"
   export _H1="Content-Type: application/json"
   export _H2="AuthorizationToken: $_tk"
+
   if ! _res="$(_post "$_body" "$_url" "" "POST")"; then
     _err "API request failed."
     return 1
   fi
+
+  # Ignorujeme chybu, pokud záznam již existuje (časté při testech)
+  if _contains "$_res" "already exists"; then
+    _info "Record already exists, skipping."
+    return 0
+  fi
+
   if _contains "$_res" "\"status\":4" || _contains "$_res" "\"status\":5" || _contains "$_res" "\"errors\""; then
-    _err "API error details: $_res"
+    _err "API error: $_res"
     return 1
   fi
   return 0
@@ -64,12 +78,16 @@ dns_czechia_rm() {
     _h="@"
   else
     _h=$(printf "%s" "$_fd" | sed "s/\.$_cz$//")
+    [ "$_h" = "$_fd" ] && _h="@"
   fi
+  [ -z "$_h" ] && _h="@"
+
   _h_esc=$(printf "%s" "$_h" | sed 's/\\/\\\\/g; s/"/\\"/g')
   _txt_esc=$(printf "%s" "$txtvalue" | sed 's/\\/\\\\/g; s/"/\\"/g')
   _body="{\"hostName\":\"$_h_esc\",\"text\":\"$_txt_esc\",\"ttl\":60,\"publishZone\":1}"
   export _H1="Content-Type: application/json"
   export _H2="AuthorizationToken: $_tk"
+  # Při mazání ignorujeme výsledek (pokud neexistuje, je to v pořádku)
   _post "$_body" "$_url" "" "DELETE" >/dev/null
   return 0
 }