The Victorian Coalition's plan to rip up Treaty is a "shameful" act, the state's former Treaty Commissioner has said.

The historic statewide Treaty — negotiated between the Victorian Government and the First Peoples' Assembly — passed state Parliament last year. However, less than a year on, the state's Liberal-National coalition has flagged its intention to repeal the agreement within 100 days should it win next month's election.

Speaking at a pre-election community event hosted by the Victorian Aboriginal Community Controlled Health Organisation (VACCHO), Gunditjmara woman Jill Gallagher, the former Commissioner of the Victorian Treaty Advancement Commission, said many people over almost 200 years — both Aboriginal and non-Aboriginal — have "impacted on what we have today".

"Potentially, we have an opposition that can say they'll rip it up in 100 days. That is shameful," the VACCHO chief executive said.

"Shameful on using our inherent rights as the First Peoples of this country against us."

Under the Treaty legislation, the First Peoples' Assembly — an elected body representing Traditional Owners — alongside a permanent truth-telling body and an accountability commission will oversee the delivery of outcomes for First Peoples through a new governance structure known as Gellung Warl.

Dismantling the entire framework associated with Treaty — including Gellung Warl, the Self-Determination Fund, which helps other Traditional Owner groups negotiate treaties, and the independent negotiating umpire, the Treaty Authority — would save the Victorian budget $247.8 million over the four years of a Liberal government, according to the state's Parliamentary Budget Office.

An opposition spokesperson told AAP this month that a Coalition government would introduce the legislation within its first 100 days.

"Labor's divisive treaty is a billion-dollar bureaucracy that will not directly deliver better outcomes for Indigenous Victorians," they said.

One Nation has also committed to scrapping Treaty and dismantling Gellung Warl to help fund its full suite of policies.

Despite being billed as an opportunity for First Peoples in Melbourne to put questions to candidates ahead of the upcoming election, no Coalition representative attended the Indigenous-led community forum on Thursday evening.

It is understood that several MPs either declined VACCHO's invitation or did not respond.

The Coalition was contacted by National Indigenous Times for comment on why no MPs attended, as well as what engagements it had planned with First Peoples ahead of the election, but had not responded by the time of publication.

Labor Health Minister Ingrid Stitt, Deputy Greens Leader Dr Sarah Mansfield and Victorian Socialists candidate Oskar Martin attended the open forum alongside Ms Gallagher, with journalist Charles Pakana moderating as candidates faced questions from local community members.

Ms Stitt told the forum that the Liberal Party's platform for its first 100 days, if elected, had "nothing" about health, "but there was a commitment to scrap treaty".

"There's so much at stake in this election; it's probably one of the most consequential elections that we've had in Victoria," she said.

Speaking to National Indigenous Times, Ms Stitt said it was vitally important to listen to the concerns of First Peoples across the state.

"I think Treaty gives us the vehicle to do that, and it gives us the architecture as well to be able to fulfil those aspirations," she said.

"That's on the line at this election."

Ms Gallagher said the debate on Indigenous affairs reminded her of the environment during the Voice referendum.

"If we do get a new coalition government in, they're talking about tearing up treaty," she told this masthead.

"That is really disappointing. It took us more than 200 years to get Treaty in this state, and they're proposing to tear it up within 100 days, so it's really scary times."