diff --git a/applications/utilities/postProcessing/lagrangian/particleTracks/createFields.H b/applications/utilities/postProcessing/lagrangian/particleTracks/createFields.H
index 8a9b6e8dac..5604c11211 100644
--- a/applications/utilities/postProcessing/lagrangian/particleTracks/createFields.H
+++ b/applications/utilities/postProcessing/lagrangian/particleTracks/createFields.H
@@ -1,13 +1,4 @@
-IOdictionary propsDict
-(
-    IOobject
-    (
-        "particleTrackProperties",
-        runTime.constant(),
-        mesh,
-        IOobject::MUST_READ_IF_MODIFIED
-    )
-);
+IOdictionary propsDict(systemDict("particleTracksDict", args, runTime));
 
 const word cloudName(propsDict.lookup("cloudName"));
 
diff --git a/applications/utilities/postProcessing/lagrangian/particleTracks/particleTrackProperties b/applications/utilities/postProcessing/lagrangian/particleTracks/particleTrackProperties
deleted file mode 100644
index b9fda9c4d7..0000000000
--- a/applications/utilities/postProcessing/lagrangian/particleTracks/particleTrackProperties
+++ /dev/null
@@ -1,24 +0,0 @@
-/*--------------------------------*- C++ -*----------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Version:  dev
-     \\/     M anipulation  |
-\*---------------------------------------------------------------------------*/
-FoamFile
-{
-    format      ascii;
-    class       dictionary;
-    object      particleTrackProperties;
-}
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-cloudName       reactingCloud1;
-
-sampleFrequency 1;
-
-maxPositions    1000000;
-
-setFormat       vtk;
-
-// ************************************************************************* //
diff --git a/applications/utilities/postProcessing/lagrangian/steadyParticleTracks/createFields.H b/applications/utilities/postProcessing/lagrangian/steadyParticleTracks/createFields.H
index fd2b9e9ac6..6302aed0ab 100644
--- a/applications/utilities/postProcessing/lagrangian/steadyParticleTracks/createFields.H
+++ b/applications/utilities/postProcessing/lagrangian/steadyParticleTracks/createFields.H
@@ -1,9 +1,4 @@
-const word dictName("particleTrackDict");
-
-IOdictionary propsDict
-(
-    systemDict(dictName, args, runTime, word::null, runTime.constant())
-);
+IOdictionary propsDict(systemDict("steadyParticleTracksDict", args, runTime));
 
 word cloudName(propsDict.lookup("cloudName"));
 
diff --git a/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.C b/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.C
index e3972c47d9..9ab5942f82 100644
--- a/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.C
+++ b/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.C
@@ -34,8 +34,7 @@ Foam::IOobject Foam::systemDictIO
     const word& dictName,
     const argList& args,
     const objectRegistry& ob,
-    const word& regionName,
-    const word& systemName
+    const word& regionName
 )
 {
     fileName dictPath = fileName::null;
@@ -79,7 +78,7 @@ Foam::IOobject Foam::systemDictIO
             IOobject
             (
                 dictName,
-                systemName == word::null ? ob.time().system() : systemName,
+                ob.time().system(),
                 regionName == polyMesh::defaultRegion ? word::null : regionName,
                 ob,
                 IOobject::MUST_READ_IF_MODIFIED,
@@ -94,15 +93,10 @@ Foam::IOdictionary Foam::systemDict
     const word& dictName,
     const argList& args,
     const objectRegistry& ob,
-    const word& regionName,
-    const word& systemName
+    const word& regionName
 )
 {
-    return
-        IOdictionary
-        (
-            systemDictIO(dictName, args, ob, regionName, systemName)
-        );
+    return IOdictionary(systemDictIO(dictName, args, ob, regionName));
 }
 
 
diff --git a/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.H b/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.H
index 75e212d8b4..52b505ae70 100644
--- a/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.H
+++ b/src/OpenFOAM/db/IOobjects/IOdictionary/systemDict.H
@@ -52,8 +52,7 @@ IOobject systemDictIO
     const word& dictName,
     const argList& args,
     const objectRegistry& ob,
-    const word& regionName = polyMesh::defaultRegion,
-    const word& systemName = word::null // defaults to ob.time().system()
+    const word& regionName = polyMesh::defaultRegion
 );
 
 IOdictionary systemDict
@@ -61,8 +60,7 @@ IOdictionary systemDict
     const word& dictName,
     const argList& args,
     const objectRegistry& ob,
-    const word& regionName = polyMesh::defaultRegion,
-    const word& systemName = word::null // defaults to ob.time().system()
+    const word& regionName = polyMesh::defaultRegion
 );
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/tutorials/combustion/reactingFoam/Lagrangian/filter/constant/particleTrackProperties b/tutorials/combustion/reactingFoam/Lagrangian/filter/constant/particleTrackProperties
deleted file mode 100644
index e1c56b911f..0000000000
--- a/tutorials/combustion/reactingFoam/Lagrangian/filter/constant/particleTrackProperties
+++ /dev/null
@@ -1,24 +0,0 @@
-/*--------------------------------*- C++ -*----------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Version:  dev
-     \\/     M anipulation  |
-\*---------------------------------------------------------------------------*/
-FoamFile
-{
-    format      ascii;
-    class       dictionary;
-    location    "constant";
-    object      particleTrackProperties;
-}
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-cloudName       reactingCloud1;
-
-sampleFrequency 1;
-
-maxPositions    1000000;
-
-
-// ************************************************************************* //
diff --git a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/constant/particleTrackProperties b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/system/particleTracksDict
similarity index 90%
rename from tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/constant/particleTrackProperties
rename to tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/system/particleTracksDict
index 86c6af0586..65fcad071e 100644
--- a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/constant/particleTrackProperties
+++ b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannel/system/particleTracksDict
@@ -9,8 +9,8 @@ FoamFile
 {
     format      ascii;
     class       dictionary;
-    location    "constant";
-    object      particleTrackProperties;
+    location    "system";
+    object      particleTracksDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/constant/particleTrackDict b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/system/steadyParticleTracksDict
similarity index 90%
rename from tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/constant/particleTrackDict
rename to tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/system/steadyParticleTracksDict
index 34206489a2..3d8b8ae0c8 100644
--- a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/constant/particleTrackDict
+++ b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/system/steadyParticleTracksDict
@@ -9,8 +9,8 @@ FoamFile
 {
     format      ascii;
     class       dictionary;
-    location    "constant";
-    object      particleTrackDict;
+    location    "system";
+    object      steadyParticleTracksDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/constant/particleTrackDict b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/system/steadyParticleTracksDict
similarity index 90%
rename from tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/constant/particleTrackDict
rename to tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/system/steadyParticleTracksDict
index 34206489a2..3d8b8ae0c8 100644
--- a/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelLTS/constant/particleTrackDict
+++ b/tutorials/combustion/reactingFoam/Lagrangian/verticalChannelSteady/system/steadyParticleTracksDict
@@ -9,8 +9,8 @@ FoamFile
 {
     format      ascii;
     class       dictionary;
-    location    "constant";
-    object      particleTrackDict;
+    location    "system";
+    object      steadyParticleTracksDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //