Symbol from legacy library ERC error: "has been modified in library [library name]"

Description

Running ERC on a symbol from a legacy library shows that the symbol is not up to date, as shown below. Even after updating symbol from library and running ERC again, the errors are still shown.

Steps to reproduce

1. Open project with legacy symbols
2. Run ERC - errors shown
3. Update all symbols from library with below settings
4. Run ERC - errors still shown

KiCad Version

Application: KiCad Schematic Editor x64 on x64

Version: 7.0.11-rc1, release build

Libraries:
	wxWidgets 3.2.4
	FreeType 2.12.1
	HarfBuzz 8.2.1
	FontConfig 2.14.2
	libcurl/8.4.0-DEV Schannel zlib/1.3

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Feb  7 2024 05:14:25
	wxWidgets: 3.2.4 (wchar_t,wx containers)
	Boost: 1.83.0
	OCC: 7.7.1
	Curl: 8.4.0-DEV
	ngspice: 41
	Compiler: Visual C++ 1936 without C++ ABI

Build settings:
	KICAD_SPICE=ON