diff --git a/build/pkgs/configure/checksums.ini b/build/pkgs/configure/checksums.ini
index a4001d8c194..56a26a7f753 100644
--- a/build/pkgs/configure/checksums.ini
+++ b/build/pkgs/configure/checksums.ini
@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=715dad7f3b54899d0b674f8702daeb00b8d91e2a
-md5=5cb724577bd74901db4aeee68d871dbd
-cksum=1223038546
+sha1=24e1f3ea7c5e65fc38ea820e466301524d0b718f
+md5=ee6bab958b3e085ffc5d40945f65b2a3
+cksum=1756651950
diff --git a/build/pkgs/configure/package-version.txt b/build/pkgs/configure/package-version.txt
index aece1e0315e..906acb16b36 100644
--- a/build/pkgs/configure/package-version.txt
+++ b/build/pkgs/configure/package-version.txt
@@ -1 +1 @@
-f9e6ae67e85164f4a1f6fa0b1aac41684ddb8905
+006d57f39e98cd9e37fcaae12daf9c1db5629342
diff --git a/src/sage/graphs/base/c_graph.pyx b/src/sage/graphs/base/c_graph.pyx
index 47f3465b3f5..2bf83ab294e 100644
--- a/src/sage/graphs/base/c_graph.pyx
+++ b/src/sage/graphs/base/c_graph.pyx
@@ -2600,12 +2600,6 @@ cdef class CGraphBackend(GenericGraphBackend):
         and an arc label.
         """
         raise NotImplementedError
-        cdef int l_int
-        if l is None:
-            l_int = 0
-        else:
-            l_int = self.new_edge_label(l)
-        return self.cg().has_arc_unsafe(u_int, v_int, l_int)
 
     cdef int free_edge_label(self, int l_int) except -1:
         raise NotImplementedError()