Quick fix to build with (still unrleeased) Qt 6.12.0.
--- a/sip/QtCore/QtCoremod.sip
+++ b/sip/QtCore/QtCoremod.sip
@@ -23,5 +23,5 @@
 %Module(name=PyQt6.QtCore, call_super_init=True, default_VirtualErrorHandler=PyQt6, keyword_arguments="Optional", use_limited_api=True, py_ssize_t_clean=True)
 
-%Timeline {Qt_6_0_0 Qt_6_1_0 Qt_6_2_0 Qt_6_3_0 Qt_6_4_0 Qt_6_5_0 Qt_6_6_0 Qt_6_7_0 Qt_6_8_0 Qt_6_9_0 Qt_6_10_0 Qt_6_11_0}
+%Timeline {Qt_6_0_0 Qt_6_1_0 Qt_6_2_0 Qt_6_3_0 Qt_6_4_0 Qt_6_5_0 Qt_6_6_0 Qt_6_7_0 Qt_6_8_0 Qt_6_9_0 Qt_6_10_0 Qt_6_11_0 Qt_6_12_0}
 
 %Platforms {Android iOS Linux macOS WebAssembly Windows}
--- a/sip/QtCore/qcoreevent.sip
+++ b/sip/QtCore/qcoreevent.sip
@@ -201,6 +201,8 @@
         TabletTrackingChange,
         GraphicsSceneLeave,
+%If (- Qt_6_12_0)
         EnterEditFocus,
         LeaveEditFocus,
+%End
 %If (Qt_6_6_0 -)
         DevicePixelRatioChange,