diff --git a/ogr/ogrsf_frmts/miramon/mm_gdal_driver_structs.h b/ogr/ogrsf_frmts/miramon/mm_gdal_driver_structs.h
index 2e9320df42d5..84548492f338 100644
--- a/ogr/ogrsf_frmts/miramon/mm_gdal_driver_structs.h
+++ b/ogr/ogrsf_frmts/miramon/mm_gdal_driver_structs.h
@@ -20,9 +20,11 @@ CPL_C_START  // Necessary for compiling in GDAL project
 #define KEY_Vers "Vers"
 #define KEY_SubVers "SubVers"
 #define MM_VERS 4
+#define MM_SUBVERS_ACCEPTED 0
 #define MM_SUBVERS 3
 #define KEY_VersMetaDades "VersMetaDades"
 #define KEY_SubVersMetaDades "SubVersMetaDades"
+#define MM_VERS_METADADES_ACCEPTED 4
 #define MM_VERS_METADADES 5
 #define MM_SUBVERS_METADADES 0
 #define SECTION_METADADES "METADADES"
diff --git a/ogr/ogrsf_frmts/miramon/mm_wrlayr.c b/ogr/ogrsf_frmts/miramon/mm_wrlayr.c
index f945d9bc2cd2..3af35c78a5d7 100644
--- a/ogr/ogrsf_frmts/miramon/mm_wrlayr.c
+++ b/ogr/ogrsf_frmts/miramon/mm_wrlayr.c
@@ -6104,16 +6104,16 @@ int MMCheck_REL_FILE(const char *szREL_file)
         return 1;
     }
 
-    // SubVers>=3?
+    // SubVers>=0?
     pszLine = MMReturnValueFromSectionINIFile(szREL_file, SECTION_VERSIO,
                                               KEY_SubVers);
     if (pszLine)
     {
-        if (*pszLine == '\0' || atoi(pszLine) < (int)MM_SUBVERS)
+        if (*pszLine == '\0' || atoi(pszLine) < (int)MM_SUBVERS_ACCEPTED)
         {
             MMCPLError(CE_Failure, CPLE_OpenFailed,
                        "The file \"%s\" must have %s>=%d.", szREL_file,
-                       KEY_SubVers, MM_SUBVERS);
+                       KEY_SubVers, MM_SUBVERS_ACCEPTED);
 
             free_function(pszLine);
             return 1;
@@ -6124,20 +6124,20 @@ int MMCheck_REL_FILE(const char *szREL_file)
     {
         MMCPLError(CE_Failure, CPLE_OpenFailed,
                    "The file \"%s\" must have %s>=%d.", szREL_file, KEY_SubVers,
-                   MM_SUBVERS);
+                   MM_SUBVERS_ACCEPTED);
         return 1;
     }
 
-    // VersMetaDades>=5?
+    // VersMetaDades>=4?
     pszLine = MMReturnValueFromSectionINIFile(szREL_file, SECTION_VERSIO,
                                               KEY_VersMetaDades);
     if (pszLine)
     {
-        if (*pszLine == '\0' || atoi(pszLine) < (int)MM_VERS_METADADES)
+        if (*pszLine == '\0' || atoi(pszLine) < (int)MM_VERS_METADADES_ACCEPTED)
         {
             MMCPLError(CE_Failure, CPLE_OpenFailed,
                        "The file \"%s\" must have %s>=%d.", szREL_file,
-                       KEY_VersMetaDades, MM_VERS_METADADES);
+                       KEY_VersMetaDades, MM_VERS_METADADES_ACCEPTED);
             free_function(pszLine);
             return 1;
         }
@@ -6147,7 +6147,7 @@ int MMCheck_REL_FILE(const char *szREL_file)
     {
         MMCPLError(CE_Failure, CPLE_OpenFailed,
                    "The file \"%s\" must have %s>=%d.", szREL_file,
-                   KEY_VersMetaDades, MM_VERS_METADADES);
+                   KEY_VersMetaDades, MM_VERS_METADADES_ACCEPTED);
         return 1;
     }