1 files changed, 5 insertions, 1 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 8fa4e23df6..6f7d5ed6e4 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -21504,7 +21504,11 @@ void ex_function(exarg_T *eap)
 
     fp = find_func(name);
     if (fp != NULL) {
-      if (!eap->forceit) {
+      // Function can be replaced with "function!" and when sourcing the
+      // same script again, but only once.
+      if (!eap->forceit
+          && (fp->uf_script_ctx.sc_sid != current_sctx.sc_sid
+              || fp->uf_script_ctx.sc_seq == current_sctx.sc_seq)) {
         emsg_funcname(e_funcexts, name);
         goto erret;
       }