diff --git a/lib/icinga/downtime.cpp b/lib/icinga/downtime.cpp
index 914531339..8e5ccabba 100644
--- a/lib/icinga/downtime.cpp
+++ b/lib/icinga/downtime.cpp
@@ -246,6 +246,12 @@ Downtime::Ptr Downtime::AddDowntime(const Checkable::Ptr& checkable, const Strin
 		if (localZone) {
 			attrs->Set("authoritative_zone", localZone->GetName());
 		}
+
+		auto sd (ScheduledDowntime::GetByName(scheduledDowntime));
+
+		if (sd) {
+			attrs->Set("config_owner_hash", sd->HashDowntimeOptions());
+		}
 	}
 
 	Host::Ptr host;
diff --git a/lib/icinga/downtime.ti b/lib/icinga/downtime.ti
index ea3c1a5ee..a015942d3 100644
--- a/lib/icinga/downtime.ti
+++ b/lib/icinga/downtime.ti
@@ -69,6 +69,7 @@ class Downtime : ConfigObject < DowntimeNameComposer
 	[state] int legacy_id;
 	[state] bool was_cancelled;
 	[config] String config_owner;
+	[config] String config_owner_hash;
 	[config] String authoritative_zone;
 
 	[no_user_view, no_user_modify] String removed_by;
diff --git a/lib/icinga/scheduleddowntime.cpp b/lib/icinga/scheduleddowntime.cpp
index ae38ca9b6..972a428ad 100644
--- a/lib/icinga/scheduleddowntime.cpp
+++ b/lib/icinga/scheduleddowntime.cpp
@@ -6,13 +6,17 @@
 #include "icinga/downtime.hpp"
 #include "icinga/service.hpp"
 #include "base/timer.hpp"
+#include "base/tlsutility.hpp"
 #include "base/configtype.hpp"
 #include "base/utility.hpp"
 #include "base/objectlock.hpp"
+#include "base/object-packer.hpp"
+#include "base/serializer.hpp"
 #include "base/convert.hpp"
 #include "base/logger.hpp"
 #include "base/exception.hpp"
 #include <boost/thread/once.hpp>
+#include <set>
 
 using namespace icinga;
 
@@ -94,6 +98,15 @@ void ScheduledDowntime::TimerProc()
 				Log(LogCritical, "ScheduledDowntime")
 					<< "Exception occurred during creation of next downtime for scheduled downtime '"
 					<< sd->GetName() << "': " << DiagnosticInformation(ex, false);
+				continue;
+			}
+
+			try {
+				sd->RemoveObsoleteDowntimes();
+			} catch (const std::exception& ex) {
+				Log(LogCritical, "ScheduledDowntime")
+					<< "Exception occurred during removal of obsolete downtime for scheduled downtime '"
+					<< sd->GetName() << "': " << DiagnosticInformation(ex, false);
 			}
 		}
 	}
@@ -236,11 +249,16 @@ void ScheduledDowntime::CreateNextDowntime()
 	}
 
 	double minEnd = 0;
+	auto downtimeOptionsHash (HashDowntimeOptions());
 
 	for (const Downtime::Ptr& downtime : GetCheckable()->GetDowntimes()) {
 		if (downtime->GetScheduledBy() != GetName())
 			continue;
 
+		auto configOwnerHash (downtime->GetConfigOwnerHash());
+		if (!configOwnerHash.IsEmpty() && configOwnerHash != downtimeOptionsHash)
+			continue;
+
 		double end = downtime->GetEndTime();
 		if (end > minEnd)
 			minEnd = end;
@@ -292,6 +310,24 @@ void ScheduledDowntime::CreateNextDowntime()
 	}
 }
 
+void ScheduledDowntime::RemoveObsoleteDowntimes()
+{
+	auto name (GetName());
+	auto downtimeOptionsHash (HashDowntimeOptions());
+
+	// Just to be sure start and removal don't happen at the same time
+	auto threshold (Utility::GetTime() + 5 * 60);
+
+	for (const Downtime::Ptr& downtime : GetCheckable()->GetDowntimes()) {
+		if (downtime->GetScheduledBy() == name && downtime->GetStartTime() > threshold) {
+			auto configOwnerHash (downtime->GetConfigOwnerHash());
+
+			if (!configOwnerHash.IsEmpty() && configOwnerHash != downtimeOptionsHash)
+				Downtime::RemoveDowntime(downtime->GetName(), false, true);
+		}
+	}
+}
+
 void ScheduledDowntime::ValidateRanges(const Lazy<Dictionary::Ptr>& lvalue, const ValidationUtils& utils)
 {
 	ObjectImpl<ScheduledDowntime>::ValidateRanges(lvalue, utils);
@@ -333,6 +369,22 @@ void ScheduledDowntime::ValidateChildOptions(const Lazy<Value>& lvalue, const Va
 	}
 }
 
+static const std::set<String> l_SDDowntimeOptions ({
+	"author", "child_options", "comment", "duration", "fixed", "ranges", "vars"
+});
+
+String ScheduledDowntime::HashDowntimeOptions()
+{
+	Dictionary::Ptr allOpts = Serialize(this, FAConfig);
+	Dictionary::Ptr opts = new Dictionary();
+
+	for (auto& opt : l_SDDowntimeOptions) {
+		opts->Set(opt, allOpts->Get(opt));
+	}
+
+	return SHA256(PackObject(opts));
+}
+
 bool ScheduledDowntime::AllConfigIsLoaded()
 {
 	return m_AllConfigLoaded.load();
diff --git a/lib/icinga/scheduleddowntime.hpp b/lib/icinga/scheduleddowntime.hpp
index 90e12d240..f8d8e0840 100644
--- a/lib/icinga/scheduleddowntime.hpp
+++ b/lib/icinga/scheduleddowntime.hpp
@@ -35,6 +35,7 @@ public:
 
 	void ValidateRanges(const Lazy<Dictionary::Ptr>& lvalue, const ValidationUtils& utils) override;
 	void ValidateChildOptions(const Lazy<Value>& lvalue, const ValidationUtils& utils) override;
+	String HashDowntimeOptions();
 
 protected:
 	void OnAllConfigLoaded() override;
@@ -46,6 +47,7 @@ private:
 	std::pair<double, double> FindRunningSegment(double minEnd = 0);
 	std::pair<double, double> FindNextSegment();
 	void CreateNextDowntime();
+	void RemoveObsoleteDowntimes();
 
 	static std::atomic<bool> m_AllConfigLoaded;