MOSCOW, June 27 (Reuters) - A senior Russian lawmaker who has been involved in a number of negotiations related to Moscow's campaign in Ukraine called late on Monday (Jun 26) for a professional army seven million strong to ensure that no mercenary groups are needed for the country's security.

Russia has been shaken by the weekend's failed mutiny by Yevgeny Prigozhin and his Wagner mercenary troops who briefly took control of a military command steering Moscow's campaign in Ukraine, then started a march on Moscow before aborting it.

Lawmaker Leonid Slutsky, who early in the 16-month war took part in peace negotiations with Ukraine, said that Russia needs a contract army of at least seven million military and civilian personnel, on top of the current conscript army.

"The country does not need any PMCs (private military companies) and their likes," Slutsky, the head of the Liberal Democratic Party, said on the Telegram messaging app. "There are problems in the regular army, but PMCs cannot solve them."

President Vladimir Putin made a defiant address on Monday saying he had deliberately let the one-day mutiny go for so long to avoid bloodshed. He said Wagner fighters can continue fighting with the Russian army, go home or go to Belarus.

When sending troops to Ukraine in February 2022 Putin assumed he would take Kyiv within days, but the war is still far from over, with many weaknesses of the Russian army and internal disputes of how to lead the campaign coming to the fore.

At the end of 2022, Putin backed beefing up the army to 1.5 million combat personnel - including 695,000 contract soldiers - from 1.15 million.

Creating a contract army of seven million would require a huge budget allowance. The Russian economy, crippled by the war and subsequent Western sanctions contracted 2.2 per cent per cent last year and is expected to rebound only marginally this year.