diff --git a/ryzom/tools/extract_r2_required/merge_sitem_list.py b/ryzom/tools/extract_r2_required/merge_sitem_list.py
index f5ef71f7f..f8b0ba147 100644
--- a/ryzom/tools/extract_r2_required/merge_sitem_list.py
+++ b/ryzom/tools/extract_r2_required/merge_sitem_list.py
@@ -16,18 +16,25 @@ def listPathExt(path, ext):
 
 listPathExt(sitemPath, ".sitem")
 
+knownMissing = {}
+with open("missing_sheets.txt", "r") as r:
+	for l in r:
+		knownMissing[l.strip()] = True
+
 with open("sitem_list.txt", "w") as w:
 	with open("sitem_missing.txt", "w") as wm:
 		with open("sitem_list_r2.txt", "r") as r:
 			for l in r:
-				w.write(l)
-				if not l.strip() in fileMap:
-					wm.write(l)
-		with open("sitem_list_wk.txt", "r") as r:
-			for l in r:
-				if len(l.strip()) > 0 and not l.startswith(";"):
+				if not l.strip() in knownMissing:
 					w.write(l)
 					if not l.strip() in fileMap:
 						wm.write(l)
+		with open("sitem_list_wk.txt", "r") as r:
+			for l in r:
+				if len(l.strip()) > 0 and not l.startswith(";"):
+					if not l.strip() in knownMissing:
+						w.write(l)
+						if not l.strip() in fileMap:
+							wm.write(l)
 		wm.flush()
 	w.flush()
diff --git a/ryzom/tools/extract_r2_required/sitem_list.txt b/ryzom/tools/extract_r2_required/sitem_list.txt
index 7190f91a2..62380696c 100644
--- a/ryzom/tools/extract_r2_required/sitem_list.txt
+++ b/ryzom/tools/extract_r2_required/sitem_list.txt
@@ -2,9 +2,6 @@ iccm1bm.sitem
 iccm1pd.sitem
 iccm1sa.sitem
 iccm1ss.sitem
-icf.sitem
-icf_2.sitem
-icf_3.sitem
 icfacb_3.sitem
 icfacp.sitem
 icfacp_2.sitem
@@ -95,9 +92,6 @@ icfsb_3.sitem
 icfss.sitem
 icfss_2.sitem
 icfss_3.sitem
-icm.sitem
-icm_2.sitem
-icm_3.sitem
 icmacb_3.sitem
 icmacp.sitem
 icmacp_2.sitem
@@ -189,9 +183,6 @@ icmss.sitem
 icmss_2.sitem
 icmss_3.sitem
 icravr.sitem
-ict.sitem
-ict_2.sitem
-ict_3.sitem
 ictacb_3.sitem
 ictacp.sitem
 ictacp_2.sitem
@@ -282,9 +273,6 @@ ictsb_3.sitem
 ictss.sitem
 ictss_2.sitem
 ictss_3.sitem
-icz.sitem
-icz_2.sitem
-icz_3.sitem
 iczacp.sitem
 iczacp_2.sitem
 iczacp_3.sitem
diff --git a/ryzom/tools/extract_r2_required/sitem_missing.txt b/ryzom/tools/extract_r2_required/sitem_missing.txt
index 2464e9f16..ca94c6e8e 100644
--- a/ryzom/tools/extract_r2_required/sitem_missing.txt
+++ b/ryzom/tools/extract_r2_required/sitem_missing.txt
@@ -2,9 +2,6 @@ iccm1bm.sitem
 iccm1pd.sitem
 iccm1sa.sitem
 iccm1ss.sitem
-icf.sitem
-icf_2.sitem
-icf_3.sitem
 icfacb_3.sitem
 icfacs_3.sitem
 icfacv_3.sitem
@@ -44,9 +41,6 @@ icfsb_3.sitem
 icfss.sitem
 icfss_2.sitem
 icfss_3.sitem
-icm.sitem
-icm_2.sitem
-icm_3.sitem
 icmacb_3.sitem
 icmacs_3.sitem
 icmacv_3.sitem
@@ -86,9 +80,6 @@ icmsb_3.sitem
 icmss.sitem
 icmss_2.sitem
 icmss_3.sitem
-ict.sitem
-ict_2.sitem
-ict_3.sitem
 ictacb_3.sitem
 ictacs_3.sitem
 ictacv_3.sitem
@@ -128,9 +119,6 @@ ictsb_3.sitem
 ictss.sitem
 ictss_2.sitem
 ictss_3.sitem
-icz.sitem
-icz_2.sitem
-icz_3.sitem
 iczm1bm.sitem
 iczm1bm_2.sitem
 iczm1bm_3.sitem