Wikipedia: Abkhazia

On March 28, 2008, the President of Georgia Mikheil Saakashvili unveiled his government's new proposals to Abkhazia: the broadest possible autonomy within the framework of a Georgian state, a joint free economic zone, representation in the central authorities including the post of vice-president with the right to veto Abkhaz-related decisions.^[24] The Abkhaz leader Sergei Bagapsh rejected these new initiatives as "propaganda", leading to Georgia's complaints that this skepticism was "triggered by Russia, rather than by real mood of the Abkhaz people."

I don't know why the original conflict led to a war, but at this point since the Georgian government doesn't control Abkhazia they can't "prevent it" from being autonomous. The Abkhazian authorities seek outright independence.

A complicating issue is that

Russia has also issued passports for the citizens of Abkhazia since 2000 (as the Abkhazian passports cannot be used for international travel) and subsequently paid retirement pensions and other monetary benefits. More than 80% of the Abkhazian population received Russian citizenship by 2006; however, Abkhazians do not pay Russian taxes, or serve in the Russian Army.^[13][14] About 53,000 Abkhazian passports have been issued as of May 2007.^[15]

When the capital development of a country becomes a by-product of the activities of a casino, the job is likely to be ill-done. — John M. Keynes