Evgenij,
Sorry my bad it is not period profile it is in Time profile OPD2 configuration check Planning Period how many Weeks you setup for Start date and Finish Date.
Planning period
The planning period defines the period in which the SAP system can carry out planning. The planning period is smaller than or equal to the evaluation period.
You cannot move operations outside the planning period. Equally, when automatic finite scheduling is carried out for an operation the system only searches for a new date within the planning period.
BR
KK