diff --git a/modules/lmdbbackend/lmdbbackend.cc b/modules/lmdbbackend/lmdbbackend.cc
index 394ed6f4ebf67..991bdedd6bdca 100644
--- a/modules/lmdbbackend/lmdbbackend.cc
+++ b/modules/lmdbbackend/lmdbbackend.cc
@@ -1810,9 +1810,7 @@ void LMDBBackend::setFresh(uint32_t domain_id)
 
 void LMDBBackend::getUpdatedPrimaries(vector<DomainInfo>& updatedDomains, std::unordered_set<DNSName>& catalogs, CatalogHashMap& catalogHashes)
 {
-  CatalogInfo ci;
-
-  getAllDomainsFiltered(&(updatedDomains), [this, &catalogs, &catalogHashes, &ci](DomainInfo& di) {
+  getAllDomainsFiltered(&(updatedDomains), [this, &catalogs, &catalogHashes](DomainInfo& di) {
     if (!di.isPrimaryType()) {
       return false;
     }
@@ -1824,12 +1822,13 @@ void LMDBBackend::getUpdatedPrimaries(vector<DomainInfo>& updatedDomains, std::u
     }
 
     if (!di.catalog.empty()) {
-      ci.fromJson(di.options, CatalogInfo::CatalogType::Producer);
-      ci.updateHash(catalogHashes, di);
+      CatalogInfo::updateCatalogHash(catalogHashes, di);
     }
 
     if (getSerial(di) && di.serial != di.notified_serial) {
       di.backend = this;
+      di.catalog.clear();
+      di.options.clear();
       return true;
     }
 
diff --git a/pdns/auth-catalogzone.cc b/pdns/auth-catalogzone.cc
index 2c6cbbce8c746..6266268add40e 100644
--- a/pdns/auth-catalogzone.cc
+++ b/pdns/auth-catalogzone.cc
@@ -27,15 +27,17 @@
 #include "dnsbackend.hh"
 #include "json.hh"
 
-void CatalogInfo::fromJson(const std::string& json, CatalogType type)
+bool CatalogInfo::parseJson(const std::string& json, CatalogType type)
 {
-  d_type = type;
-  if (d_type == CatalogType::None) {
+  if (type == CatalogType::None) {
     throw std::runtime_error("CatalogType is set to None");
   }
 
+  d_type = type;
+
   if (json.empty()) {
-    return;
+    d_doc = nullptr;
+    return false;
   }
 
   std::string err;
@@ -44,7 +46,12 @@ void CatalogInfo::fromJson(const std::string& json, CatalogType type)
     throw std::runtime_error("Parsing of JSON options failed: " + err);
   }
 
-  if (!d_doc[getTypeString(d_type)].is_null()) {
+  return !d_doc[getTypeString(d_type)].is_null();
+}
+
+void CatalogInfo::fromJson(const std::string& json, CatalogType type)
+{
+  if (parseJson(json, type)) {
     auto items = d_doc[getTypeString(type)].object_items();
 
     // coo property
@@ -107,11 +114,12 @@ std::string CatalogInfo::toJson() const
   return ret.dump();
 }
 
-void CatalogInfo::updateHash(CatalogHashMap& hashes, const DomainInfo& di) const
+void CatalogInfo::updateCatalogHash(CatalogHashMap& hashes, const DomainInfo& di)
 {
-  hashes[di.catalog].process(std::to_string(di.id) + di.zone.toLogString() + string("\0", 1) + d_coo.toLogString() + string("\0", 1) + d_unique.toLogString());
-  for (const auto& group : d_group) {
-    hashes[di.catalog].process(std::to_string(group.length()) + group);
+  CatalogInfo ci;
+  hashes[di.catalog].process(std::to_string(di.id) + di.zone.toLogString());
+  if (ci.parseJson(di.options, CatalogType::Producer)) {
+    hashes[di.catalog].process(ci.d_doc["producer"].dump());
   }
 }
 
diff --git a/pdns/auth-catalogzone.hh b/pdns/auth-catalogzone.hh
index d8a4fe907cbfd..0f2b578362dc3 100644
--- a/pdns/auth-catalogzone.hh
+++ b/pdns/auth-catalogzone.hh
@@ -59,7 +59,7 @@ public:
   std::string toJson() const;
   void setType(CatalogType type) { d_type = type; }
 
-  void updateHash(CatalogHashMap& hashes, const DomainInfo& di) const;
+  static void updateCatalogHash(CatalogHashMap& hashes, const DomainInfo& di);
   DNSName getUnique() const { return DNSName(toBase32Hex(hashQNameWithSalt(std::to_string(d_id), 0, d_zone))); } // salt with domain id to detect recreated zones
   static DNSZoneRecord getCatalogVersionRecord(const DNSName& zone);
   void toDNSZoneRecords(const DNSName& zone, vector<DNSZoneRecord>& dzrs) const;
@@ -77,4 +77,6 @@ public:
 private:
   CatalogType d_type;
   json11::Json d_doc;
+
+  bool parseJson(const std::string& json, CatalogType type);
 };
diff --git a/pdns/backends/gsql/gsqlbackend.cc b/pdns/backends/gsql/gsqlbackend.cc
index 0adaadd4cef39..2ff5c695e8a7b 100644
--- a/pdns/backends/gsql/gsqlbackend.cc
+++ b/pdns/backends/gsql/gsqlbackend.cc
@@ -593,8 +593,8 @@ void GSQLBackend::getUpdatedPrimaries(vector<DomainInfo>& updatedDomains, std::u
 
     try {
       if (!row[5].empty()) {
-        ci.fromJson(row[4], CatalogInfo::CatalogType::Producer);
-        ci.updateHash(catalogHashes, di);
+        di.options = row[4];
+        CatalogInfo::updateCatalogHash(catalogHashes, di);
       }
     }
     catch (const std::exception& e) {
@@ -626,6 +626,7 @@ void GSQLBackend::getUpdatedPrimaries(vector<DomainInfo>& updatedDomains, std::u
       di.kind = DomainInfo::Primary;
       di.serial = sd.serial;
       di.catalog.clear();
+      di.options.clear();
 
       updatedDomains.emplace_back(di);
     }