diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index 33ee5887127..7fdbe522c79 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -2542,11 +2542,10 @@ typedef enum GreasePencilModifierColorMode {
 } GreasePencilModifierColorMode;
 
 typedef enum GreasePencilOpacityModifierFlag {
-  MOD_GREASE_PENCIL_OPACITY_OPEN_INFLUENCE_PANEL = (1 << 0),
   /* Use vertex group as opacity factors instead of influence. */
-  MOD_GREASE_PENCIL_OPACITY_USE_WEIGHT_AS_FACTOR = (1 << 1),
+  MOD_GREASE_PENCIL_OPACITY_USE_WEIGHT_AS_FACTOR = (1 << 0),
   /* Set the opacity for every point in a stroke, otherwise multiply existing opacity. */
-  MOD_GREASE_PENCIL_OPACITY_USE_UNIFORM_OPACITY = (1 << 2),
+  MOD_GREASE_PENCIL_OPACITY_USE_UNIFORM_OPACITY = (1 << 1),
 } GreasePencilOpacityModifierFlag;
 
 typedef struct GreasePencilSubdivModifierData {
diff --git a/source/blender/makesrna/intern/rna_modifier.cc b/source/blender/makesrna/intern/rna_modifier.cc
index bfb5d8a5bad..90b952a55b7 100644
--- a/source/blender/makesrna/intern/rna_modifier.cc
+++ b/source/blender/makesrna/intern/rna_modifier.cc
@@ -7695,13 +7695,6 @@ static void rna_def_modifier_grease_pencil_opacity(BlenderRNA *brna)
       srna, "rna_GreasePencilOpacityModifier_vertex_group_name_set");
   rna_def_modifier_grease_pencil_custom_curve(srna);
 
-  prop = RNA_def_property(srna, "open_influence_panel", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(
-      prop, nullptr, "flag", MOD_GREASE_PENCIL_OPACITY_OPEN_INFLUENCE_PANEL);
-  RNA_def_property_ui_text(prop, "Open Influence Panel", "Open the influence panel");
-  RNA_def_property_flag(prop, PROP_NO_DEG_UPDATE);
-  RNA_def_property_update(prop, NC_OBJECT | ND_MODIFIER, nullptr);
-
   RNA_define_lib_overridable(true);
 
   prop = RNA_def_property(srna, "color_mode", PROP_ENUM, PROP_NONE);
diff --git a/source/blender/modifiers/intern/MOD_grease_pencil_opacity.cc b/source/blender/modifiers/intern/MOD_grease_pencil_opacity.cc
index 3df437da665..03029fa439d 100644
--- a/source/blender/modifiers/intern/MOD_grease_pencil_opacity.cc
+++ b/source/blender/modifiers/intern/MOD_grease_pencil_opacity.cc
@@ -17,6 +17,7 @@
 #include "BKE_geometry_set.hh"
 #include "BKE_grease_pencil.hh"
 #include "BKE_modifier.hh"
+#include "BKE_screen.hh"
 
 #include "BLO_read_write.hh"
 
@@ -262,8 +263,12 @@ static void panel_draw(const bContext *C, Panel *panel)
     }
   }
 
+  LayoutPanelState *influence_panel_state = BKE_panel_layout_panel_state_ensure(
+      panel, "influence", true);
+  PointerRNA influence_state_ptr = RNA_pointer_create(
+      nullptr, &RNA_LayoutPanelState, influence_panel_state);
   if (uiLayout *influence_panel = uiLayoutPanel(
-          C, layout, "Influence", ptr, "open_influence_panel"))
+          C, layout, "Influence", &influence_state_ptr, "is_open"))
   {
     modifier::greasepencil::draw_layer_filter_settings(C, influence_panel, ptr);
     modifier::greasepencil::draw_material_filter_settings(C, influence_panel, ptr);